Question

The following four circuits have been made for studying the dependence of current on the potential difference across a resistor.




The correct circuit is :

(1) A
(2) B
(3) C
(4) D

Answer 1

To study the dependence of current on the potential difference across a resistor, the ammeter is connected in series and the voltmeter is connected in parallel. As the current moves from higher potential to lower potential, so the polarities of both ammeter and voltmeter are set according to the direction of flow of current.

Out of all the given circuits, only circuit 'A' is correct because ammeter and voltmeter both are connected properly with the correct polarities.

Hence, the correct answer is option 1.