Measurements and Instrumentation

Q1: Consider the following operation in respect of Wheatstone bridge (K_b, denotes battery key, K_g denotes galvanometer key)

open K_b

close K_g

close K_b

open K_g

The correct sequence of operations is

A 1, 2, 3, 4

B 3, 1, 2, 4

C 4, 3, 2, 1

D 3, 2, 4, 1

ANS:D - 3, 2, 4, 1

Battery key must be closed before galvanometer key. Moreover galvanometer key must be opened before battery key. This is to avoid damage to galvanometer.

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