Question

In the circuit shown $P eqR,$ the reading of galvanometer is same with switch S open or closed. Then

• A. $I_R=I_G$
• B. $I_P=I_G$
• C. $I_Q=I_G$
• D. $I_Q=I_R$

Answer 1

Answer: (A)

$I_R=I_G$

Answer 2

As there is no change in the reading of galvanometer with switch S open or closed. It implies that bridge is balanced.
Current through S is zero and I_R=I_G,I_P=I_