State Ohm's law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.

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Solution

Ohm's law states that electric current flowing through a metallic wire is directly proportional to the potential difference V across its ends provided its temperature remains the same.
The experimental set up is shown below:

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State Ohm's law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.

Q. What is a circuit diagram? Draw the labelled diagram of an electric circuit comprising of a cell, a resistance, an ammeter, a voltmeter and a closed switch (or closed plug key). Which of the two has a large resistance : an ammeter or a voltmeter?

Q. Choose the appropriate set of apparatus for performing the experiment to determine the equivalent resistance of two resistors when connected in series:
(1) Voltmeter, Ammeter, Two resistors, Key, Battery
(2) Ammeter, Two resistors, Key, Connecting wires, Rheostat, Battery
(3) Key, Rheostat, Voltmeter, Two resistors, Battery, Connecting wires
(4) Battery, Ammeter, Connecting wires, Rheostat, Voltmeter, Two resistors, Key

Q. Arrange the following steps to verify the Ohm's law in proper sequence.
(a) Switch on the electric circuit.
(b) Move the position of the slider of the rheostat and note down the ammeter and voltmeter readings.
(c) Connect ammeter, key, battery, rheostat and resistor in series by using conducting wires.
(d) Note down the Ammeter and voltmeter reading.
(e) Connect a voltmeter across the resistor.
(f) Determine the ratio of voltmeter reading and ammeter reading in each case.
(g) Note that the ratio of voltmeter and ammeter reading are equal in each case.

Q. Draw the circuit diagram of an electric circuit containing a battery of 6 V, a key, an ammeter, a resistor of 4 Ω in series with a combination of two resistors of 8 Ω each in parallel, and a voltmeter across the parallel combination.
(a) Calculate the resistance of the circuit.
(b) Find the current flowing in the circuit.
(c) What will be the voltage across the parallel combination of resistors?

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Ohm's Law

Standard X Physics

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State Ohm's law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.

Ohm's law states that electric current flowing through a metallic wire is directly proportional to the potential difference V across its ends provided its temperature remains the same. The experimental set up is shown below:

Ohm's law states that electric current flowing through a metallic wire is directly proportional to the potential difference V across its ends provided its temperature remains the same.
The experimental set up is shown below: