(a) potential difference Question 3: The connecting wires should be thick copper wires and the insulation of their ends should be removed using the sand paper. Simple to use Ohm's Law Calculator. The nature of resistor (a conductor having some resistance.). Make the connections as per circuit diagram. (c) ohm Ohm’s Law can be easily verified by the following experiment: Appartus Required: Resistor; Ammeter; Voltmeter; Battery; Plug Key; Rheostat; Circuit Diagram: Procedure: Initially, the key K is closed and the rheostat is adjusted to get the minimum reading in Ammeter A and voltmeter. The plot correctly showing the dependence of the current 1 on the potential difference V across a resistor R is. Using Ohm's Law (ESBQ8) We are now ready to see how Ohm's Law is used to analyse circuits. To help us understand the the relationship between the various values a little further, we can take all of the Ohm’s Law equations from above for finding Voltage, Current, Resistance and of course Power and condense them into a simple Ohms Law pie chart for use in AC and DC circuits and calculations as shown. (a) 0.020 V On replacing nichrome wire with manganin the current will increase and the potential difference will increase. Ohm's law states that the amount of electric current through a conductor in a circuit is directly proportional to the voltage across it. 4 Resistors 50Ω, 100Ω, 0.5Watt … (c) ammeter and rheostat .’. What is the least count? This law states that voltage is equal to the product of the total current and the total resistance. (b) damage of resistor The electrons were discovered much later. Аnswer: (a) We must keep the circuit closed for a relatively shorter time and open for a relatively longer time. Question 1: Jyothi Lakshmi wants to verify Ohm’s law experimentally. Аnswer: The current flowing through a resistor connected in a circuit and the potential difference developed across its ends are as shown in the diagram. (c) Least count is range divided by number of divisions. It means there is: To make electric heater the wire used should be offering high resistance. For which one of the following, Bohr model is not valid? (c) Current will not flow through voltmeter as the key is open. (a) voltmeter The following circuit diagram shows the experimental set-up for the study of dependence of current on potential-difference. When the piston is in equilibrium, the volume of the gas is $V_0$ and its pressure is $p_0$. (d) Resistor, Question 18: (d) In circuit I, the current 5V/5 ohm = 1 A. (c) positive error How do the values of current through the nichrome wire and potential difference across the two ends of it may change? Current should be passed through the circuit for a short time while taking observations; otherwise current would cause unnecessary heating in the circuit. For effective use should be used intermittently. (a) same reading in both the ammeter and the voltmeter It is also used to stop the current through circuit when it is open. Question 14: For the experiment “to find the equivalent resistance of the two given resistors connected in parallel” the following circuit was drawn by a student. (b) ampere Question 11: (c) 1 A in both the cases 2. What is the unit of potential difference and how do we measure potential difference? Аnswer: Question 19: S.I. Ohms law can be used to identify the relationship between voltage, current, and resistance in any DC electrical circuit discovered by a German physicist named, Georg Ohm. (b) 0.01 A (b) B and C The least value that an instrument can measure is called its least count. The amount of heat, extracted from the source in a single cycle is. • Construct a circuit using resistors, wires and a breadboard from a circuit diagram. When 1 joule of work is done to move a charge of 1 coulomb from one point to the other, then potential difference (d) coulomb, Question 6: For the circuits shown in figures I and II, the ammeter readings would be: (b) (a) in both the set-ups. Define electric current. (b) decreases with temperature Materials Required In circuit II, the current flows and hence 2V. The intensity of the emergent light is, An ideal gas enclosed in a vertical cylindrical container supports a freely moving piston of mass $M$. Set up your circuit with the power supply OFF and the output voltage turned DOWN TO ZERO. In the circuit given below the voltmeter and ammeter readings are respectively Question 7: Use Ohms law to relate resistance, current and voltage. The teacher pointed out the possibility of the following faults: (a) Voltmeter is connected in parallel while ammeter is connected in series. Question 6: 2.2 APPARATUS REQUIRED: S. No Apparatus Name Range Type Quantity 1 RPS 2 Ammeter 3 Voltmeter 4 Resistor 5 Rheostat 6 Bread Board 7 Connecting Wires 2.3 CIRCUIT DIAGRAM: Fig – 2.1 Circuit Diagram 2.4 PROCEDURE: 1. Аnswer: (b) ammeter and voltmeter (d) Resistance depends on all the given factors. A. the ammeter was not correctly connected in the circuit Its unit is volt and is measured by a device called voltmeter. (b) length of the wire Question 8: (d) 0 V in circuit I and 2 V in circuit II. Question 4: (c) 7.5 V In (B) as, the initial point at rheostat is in circuit therefore, minimum resistance is in circuit. The entire system is thermally insulated. Question 42: B. the voltmeter was not correctly connected in the circuit The phase difference between displacement and acceleration of a particle in a simple harmonic motion is: A cylinder contains hydrogen gas at pressure of Just enter 2 known values and the calculator will solve for the others. (d) galvanometer, Question 3: single resistor to verify Ohm's Law using resistors in dc circuits 2. What will you infer if the deflection takes place in opposite direction? Аnswer: (b) ampere What is the nature of graph obtained for V and I? The unnecessary current flows through the circuit causes the heating effect and changes the resistance. NCERT Solutions for Class 6 Social Science History Chapter 1 What, Where, How and When? (b) length of wire What is the formula used to calculate the resistivity of a given wire? Why? (a) battery and Voltmeter (b) It is the correct statement for the circuit. CBSE Class 10 Science Practicals Lab Manual MCQ Аnswers: Physics Lab Manual CBSE Class 10 Scoring Key With Explanation, NCERT Solutions for Class 6 Social Science History Chapter 2 On the Trial of the Earliest People. Check the +ve and -ve terminals of voltmeter before connecting it in the circuit. In this experiment it is advised to take out the key from the plug when the observations are not being taken. 2 Ammeter 0-500mA 1 No. If charge $q_0$ is given a small displacement $y ( y << a)$ along the y-axis, the net force acting on the particle is proportional to, Diameter of a plano-convex lens is 6 cm and thickness at the, A charge Q is uniformly distributed over a long rod AB of length L as shown in the figure. (a) I is directly proportional to V. Hence, straight line graph. (a) The voltmeter should have very high resistance so that it doesn’t allow current to flow through it and thus change the currents in the rest of the circuit. (a) no reading in either the ammeter or the voltmeter. If the deflection takes place in opposite direction than the connections need to be checked and the terminals need to be interchanged. Question 27: A simple circuit to verify Ohm's law Take four or five dry cells, a thin wire (AB), a voltmeter, an ammeter, a plug key and some thick connecting wires. A contains an ideal gas at standard temperature and pressure. Principles 2.1. 4. (c) Current (I) =V/R= 1 A and potential difference (V) = RI = 2V. To verify Ohm's law, a student connects the voltmeter across the battery as, shown in the figure. Question 7: The given graph, is plotted for V-I to verify Ohm’s law. 4. Question 25: Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. (d) The resistors R1 and R2 have been correctly connected in parallel. NCERT Solutions for Class 8 Science Chapter 18 Pollution of Air and Water, NCERT Solutions for Class 8 Science Chapter 17 Stars and the Solar System, NCERT Solutions for Class 8 Science Chapter 16 Light, NCERT Solutions for Class 8 Science Chapter 15 Some Natural Phenomena, NCERT Solutions for Class 8 Science Chapter 14 Chemical Effects of Electric Current, NCERT Solutions for Class 8 Science Chapter 13 Sound, NCERT Solutions for Class 8 Science Chapter 12 Friction, NCERT Solutions for Class 8 Science Chapter 11 Force and Pressure, NCERT Solutions for Class 8 Science Chapter 10 Reaching the Age of Adolescence, NCERT Solutions for Class 8 Science Chapter 9 Reproduction in Animals, NCERT Solutions for Class 8 Science Chapter 8 Cell Structure and Functions, NCERT Solutions for Class 8 Science Chapter 7 Conservation of Plants and Animals, NCERT Solutions for Class 8 Science Chapter 6 Combustion and Flame. The ammeter connected in a circuit reads 0.01 A when battery is switched off. For the two students, the value of the emf used by student (A) and the resistance due to the rheostat Question 1: The instrument used to measure the potential difference is Least count of voltmeter = =  ………………. Question 6: It is measured by an instrument called the voltmeter. Аnswer: Question 37: The graph of V-I is a straight line. OR Question 35: Identify the circuit in which the electrical components have been properly connected. Experimental Verification of Ohm’s Law. Ohm's Law 1. It produces 1.5 volts of p.d. (b) becomes double While performing Ohm’s law experiment a student observed that the pointer of the voltmeter coincides with 15th division. Ohm's law Introduction. The measured voltage is plotted as a function of the current, and the following graph is obtained; If V 0 is almost zero, identify the correct statement : (1) The value of the resistance R is 1.5 Ω (a) 0 A in circuit I and 1 A in circuit II The resistance of the lead wires is $6 \, \Omega$. Plot a graph of voltmeter reading and current reading. Question 3: Connect them with the connecting wires and keep the key open. Range of voltmeter = VR…………………… Question 9: (d) none of these, Question 2: This helps in taking accurate readings. (b) power Connect the ammeter in series and check for the deflection and connect voltmeter in parallel to the resistor in the circuit and check for the deflection. Questions based on Procedural and Manipulative Skills An ammeter has 20 divisions between mark 0 and mark 2 on its scale. (c) C and D (c) rheostat (d) Through series, the current flows the same. JEE Main 2013: Correct set up to verify Ohm’s law is: (A) Image A (B) Image B (C) Image C (D) Image D. Check Answer and Solution for above Physics q In the above circuit diagram, the components connected in parallel are: If the length of a given resistor is increased, what will happen to the overall resistance? Heating may change the resistance of resisters. Аnswer: Аnswer: Question 1: 1 electron = 1.6 x 10-19C. A. To verify Ohm’s law the given circuit diagram was drawn by a student. (b) Resistor and voltmeter are the two components connected in parallel. unit of current is ampere. (c) 0.1 Question 4: (d) In circuit I, the key is open, so 0V. (d) joule, Question 5: Question 26: (d) variable resistance. ∴ R1 should be parallel to voltmeter & R2 should be series with ammeter. (b) 1 V and 2 A Ohm’s Law and Kirchhoff’s Laws place constraints on voltages and current within a circuit, thus providing important information about these variables. Question 43: (a) voltmeter KCL AND KVL DEEE-EMS LAB SAI SPURTHI INSTITUE TECHNOLOGY- B.GANGARAM VERIFICATION OF KIRCHOFF CURRENT AND VOLTAGE LAWS AIM: To verify Kirchhoff’s current law and voltage law. (a) Voltmeter They kept the contact J in four different positions, marked (a), (b), (c) and (d) in the two figures. In an electric circuit Battery, Plug key, Ammeter, Iron nail are connected in Series combination. Аnswer: Question 16: In 1 coulomb 6.25 x 1018 electrons are present. Procedure, Observation Table The approximate value of the resistor is: Question 21: (a) damage of instrument used by student (B), will each be minimum when the contact J is in the position. The fringes obtained on the screen will be, A beam of unpolarized light of intensity $I_0$ is passed through a polaroid $A$ and then through another polaroid $B$ which is oriented so that its principal plane makes an angle of 45$^{\circ}$ relative to that of $A$. Connect the circuit as shown in figure, using one cell. Calculate Power, Current, Voltage or Resistance. (a) Potential difference is measured by voltmeter. (c) (d) in set-up (A) and (a) in set-up (B). Define potential difference. The stop cock is suddenly opened. (a) The voltmeter has been correctly connected in the circuit. (d) 1 V and 1 A. To study the dependence of the current (I) on the potential difference (V), across a resistor, two students used two set-ups shown in figures (A) and (B) respectively. A student wanted to make a battery of 6 V of cells with e.m.f 1.5 V each. The SI unit of resistance of a wire is 3. Ohm performed repeated experiments on a resistor, applied different voltages, measured current and found relationship between these quantities. Two coherent point sources $S_1$ and $S_2$ are separated by a small distance $d$ as shown. (b) resistor and voltmeter 5. Аnswer: Suppose in this experiment you see that the deflection on ammeter (or voltmeter) scale goes beyond the full scale. The refractive index of a particular material is 1.67 for blue light, 1.65 for yellow light and 1.63 for red light. Question 2: The diagram besideshows the single circuit that we will use for thisexperiment:We could choose a Voltage … Question 37: volt. Assuming that the system is completely isolated from its surrounding, the piston executes a simple harmonic motion with frequency, The graph between angle of deviation $(\delta)$ and angle of incidence (i) for a triangular prism is represented by, Two charges, each equal to $q$, are kept at $x = - a$ and $x = a$ on the $x-axis$. If your circuit is not properly connected, it is possible to damage the electronic equipment used in this lab. • Test the validity of Ohm’s law. The least count of the ammeter is Suggest the material needed to him to do the related activity. Keep the devices as shown in the circuit diagram. (c) Straight line is obtained as V and I are directly proportional to each other. (1) Here, Here R is a constant for the given element and is called its resistance. Least count of ammeter = = …………….. ampere. (c) resistance This will allow you to verify Ohm’s law through simulation, verify Kirchoff’s laws, or calculate the transient behavior of the voltage and current in a circuit. Which two components are connected in the series? 2) Ammeter is always connected in series in the circuit while voltmeter is parallel to the conductor. In Ohm’s circuit which of the following does not have © and © terminals? (b) ammeter (b) 0 A in both the cases The rate of flow of charge in a conductor is called electric current. B is completely evacuated. The resistance of a wire depends on (b) 27 IMPORTANT: Special concerns for Ohm’s law experiment 1. (b) zero error 1 No. (b) The -ve of voltmeter should be connected to +ve of ammeter and R( and R, should be connected in parallel. Which of the following set-up is correct for the verification of Ohm’s law. What is coulomb? Give its SI unit. Here comes a proportionality constant (1/R) and the Ohm’s law equation becomes, I = (1/R) V => I = V/R or, V = IR ………………. The piston and the cylinder have equal cross-sectional area $A$. (b) Ammeter is in series and voltmeter is in parallel. The value of R is found to be same and constant in all three readings. The resistance of a wire depends on: Potential difference In an electric circuit carrying current, the work done to move a unit charge from one point to the other is called potential difference. Experiment to verify ohm's law . It is measured by the device called ammeter. (b) ammeter and resistor (potential difference). The unit of electric current is If the potential difference across the ends of a conductor is 1 volt and the current flowing through it is 1 ampere, then resistance of the conductor is 1 ohm. Close the sky, so that current begins to flow in the circuit. Question 24: (b) no reading in the voltmeter but a finite reading in the ammeter. Correct answer: 4. (d) is zero. Question 15: Why is it advised to clean the ends of connecting wires before connecting them? Least count of ammeter and voltmeter. Such cells are also called accumulators or storage cells. (b) Secondary cells can be recharged using a charger. Aim of experiment The main purpose of this laboratory experiment is: to learn the proper use of electrical meters to measure the resistance of resistor by different methods to examine the current-voltage relation for the simplest circuit element i.e. Key: It is used to pass the current through circuit when it is closed. Volt meter is connected at the ends of the iron nail in parallel combination. (d) becomes four times, Question 13: Connect the various components as. In a circuit ammeter is always connected in series and voltmeter is connected in parallel across the points between which potential difference is to be measured. (d) negative error. On x axis take V and on y axis take I. .’. A sonometer wire of length 1.5 m is made of steel. (c) no reading in the ammeter but a finite reading in the voltmeter. 2. The resistance of the conductor used in the experiment is: The slope of this straight line graph gives: is of 1 volt. Each and every wire that may be a very good conductor of electricity will certainly offer some resistance to the flow of electrons. Its density is :$(R = 8.3\,J\,mol^{-1}K^{-1}$). (a) P (b) Q (c) R (d) S. More Resources CBSE Class 10 Lab Manual Practical Skills: Kerala Syllabus 9th Standard Physics Solutions Guide, Kerala Syllabus 9th Standard Biology Solutions Guide, NCERT Class 10 Science Lab Manual – Ohm’s Law, CBSE Class 10 Science Lab Manual Practical Based Questions, Science lab manual class 10 NCERT Lab Manual Questions, Science lab activities for class 10 CBSE Multiple Choice Questions (MCQs). The graph of V and I is a straight line. (d) ammeter and voltmeter. (b) ammeter (c) some reading in the ammeter but no reading in the voltmeter. (d) some reading in the voltmeter but no reading in ammeter. (b) 0.025 V What is the decrease of voltage across the bulb, when a $240\, W$ heater is switched on in parallel to the bulb? Question 9: The area of cross-section of the resistor. Number of divisions in ammeter = AN………………………….. Question 32: (d) Least count is range divided by number of divisions. (b) In (A) as only cell is in circuit, therefore, voltmeter reads minimum emf. Science Lab Manual Class 10 Experiment – 1, Aim 3) The electrical current should not flow the circuit for long time, Otherwise its temperature will increase and the result will be affected. On increasing the length of the resistor its resistance increases. In a circuit ammeter is always connected in series and voltmeter is always connected in parallel. Question 36: What does X, Y and Z in the circuit stand for respectively? The correct set-up for studying the dependence of the current on the potential difference across a resistor is. If in the ammeter, there are 10 divisions from 0 to 0.1 A then each division indicates 0.01 A. Theory. (c) 0.050 V What does the straight line of a graph indicate? 2. Suppose the ammeter (or voltmeter) you are using in this experiment do not have positive (+) and negative (-) terminal markings. (c) joule Questions based on Reporting and Interpretation Skills Question 29: (d) all of the above. (c) cross-sectional area of wire Аnswer: Before closing the circuit show the connections to the teacher to take the readings. Question 1: Define 1 ohm. (d) all of these, Questions based on Observational Skills In a voltmeter there are 20 divisions between the 0 mark and 0.5 V mark. Number of divisions in voltmeter = VN (c) becomes halved The SI unit of potential difference is volt (V). (d) 0.250 V. Question 10: Аnswer: (a) material of wire NAME OF THE APPARATUS; S.No. Procedure : 1. Using Circuit Simulators for Validating Ohm’s Law. What will you infer from such an observation? (d) 75 V. Question 30: Question 20: (b) 2 V in both the circuits CBSE Maths notes, CBSE physics notes, CBSE chemistry notes, Experiment To Verify Ohm’s Law Class 10 CBSE, Ohm’s Law Experiment Class 10 Pdf Introduction. (a) material of the wire Аnswer: Question 22: (d) rheostat. Ohm’s Law 2.1 Objectives • Become familiar with the use of a digital voltmeter and a digital ammeter to measure DC voltage and current. B. (a) 0.75 V Ohm's law states that under constant temperature, the current passing through conductor is directly proportional to potential difference applied across it. (a) Reading = Least count x Division of reading. Аnswer: The instrument used to measure electric current is What will happen to current passing through a conductor if potential difference across it is doubled and the resistance is halved? (a) volt What are the factors that affect resistance? So the option A is the correct setups for verifying Ohm's law. Color coding technique is used to represent the values of resistors in the form of colored bands. Question 4: A body weighs 72 N on the surface of the earth. The current flowing through a conductor and the potential difference across its two ends are as per reading of the ammeter and the voltmeter shown below. A student arranged an electric circuit as shown below: 5. Question 33: (c) is constant with rise in temperature Define 1 volt. Аnswer: Question 9: Identify the circuit in which the electrical components have been properly connected. (c) 3 Ω The potential difference V across the ends of a given metallic wire in an electric circuit is directly proportional to the current flowing through it, provided its temperature remains same. Question 12: (d) 0.1 A. Find the value of the resistance of the resistor is. This shows that V∝I. Question 38: An ammeter has a range of (0-3) ampere and there are 30 divisions on its scale. 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