Question

The deflection in a moving coil galvanometer is reduced to half, when it is shunted with a 40 ohm coil. The resistance of the galvanometer is-

• A. 20 ohm
• B. 40 ohm
• C. 80 ohm
• D. 60 ohm

Answer 1

Answer: (B)

40 ohm

Answer 2

Use S = $\frac { \phi _ { 2 } \mathrm { R } _ { \mathrm { g } } } { \phi _ { 1 } - \phi _ { 2 } }$ where f₂ =