Consider the following circuits:

On plugging the key, the voltmeter/ammeter is likely to be damaged:

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

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Solution

An ammeter is a low impedance device while a voltmeter is a high impedance device.

In circuit A, there is only a high impedance voltmeter connected in series, so a very low amount of current will flow in the circuit which will not damage the device. In circuits B and D, there will not be any damages too because of the presence of high impedance voltmeter connected in series, which will lower the amount of current flowing in the circuit. But, in circuit C, a low impedance ammeter is connected directly to the battery, hence a large amount of current will flow through the ammeter. So, it is likely to be damaged.

Hence, the correct answer is option 3.

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Consider the following circuits: On plugging the key, the voltmeter/ammeter is likely to be damaged: (1) in circuit A (2) in circuit B (3) in circuit C (4) in circuit D

Consider the following circuits:

On plugging the key, the voltmeter/ammeter is likely to be damaged:

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