Question

A galvanometer of resistance $40 \Omega$ gives a deflection of 5 divisions per mA. There are 50 divisions on the scale. The maximum current that can press through it when a shunt resistance of $2 \Omega$ is connected is

• A. 210 mA
• B. 15 mA
• C. 420 mA
• D. 75 mA

Answer 1

Answer: (A)

210 mA

Answer 2

$\mathrm { R } _ { \mathrm { G } } = 40 \Omega , \mathrm { R } _ { \mathrm { s } } = 2 \Omega$

Maximum current