Question

An ammeter and a voltmeter of resistance \( R \) are connected in series to an electric cell of negligible internal resistance. Their readings are A and V respectively. If another resistance \( R' \) is connected in parallel with the voltmeter, then?

• A. both \( A \) and \( V \) will increase
• B. both \( A \) and \( V \) will decrease
• C. \( A \) will decrease and \( V \) will increase
• D. \( A \) will increase and \( V \) will decrease

Hint:

Adding a parallel resistor to a circuit decreases the overall resistance and increases the current.

Answer 1

The Correct Option is D

By connecting a resistor in parallel with the voltmeter, the total resistance in the circuit decreases, which leads to an increase in current (\( A \)) and a decrease in the voltage across the voltmeter (\( V \)).