Question

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.

• A. c a e d b f g
• B. c e a d b f g
• C. a b e c d f g
• D. b c e d f h g

Answer 1

The correct option is B c e a d b f g

Initially, all the components like the ammeter, rheostat, resistor and the battery are connected in series by using connecting wires. Now, connect the voltmeter across the resistor. The circuit is closed and then switch on the electric circuit. The ammeter and voltmeter will show deflections. The ammeter and voltmeter reading are determined and change the position of the slider of the rheostat and note down the ammeter and voltmeter readings. Change the magnitude of current flowing through the circuit and in each case determine the ratio of voltmeter and ammeter reading. It can be shown that the ratio is constant in all the cases.
Hence, the order of the experiment as given in the question is c, e, a, d, b, f, g.