Question

The correct set up for studying the dependence of the current on the potential difference across a resistor is ​

Answer 1

c is the correct ans. and in add. the circuit is open as key is not closed

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Answer 2

Answer:

Circuit diagram shown in option (C) shows the correct set-up for studying the dependence of the current on the potential difference across a resistor.  

Reason:

In diagram (C), the voltmeter is connected in parallel and the ammeter is connected in series as they should be. The potential difference across the resistor can be seen on the voltmeter and its current dependence on the ammeter.