A galvanometer of resistance 100 Ω gives full scale deflection at 10 mA current. What should be the value of shunt so that it can measure a current of 100 mA ?

Question

A galvanometer of resistance 100 Ω gives full scale deflection at 10 mA current. What should be the value of shunt so that it can measure a current of 100 mA ? (A) 11.11 Ω (B) 1.1 Ω (C) 9.9 Ω (D) 4.4 Ω

Tardigrade Admin · Accepted Answer

S=(10 × 10-3 × 100/(100-10) × 10-3) =(1000/90)=11.11 Ω

Q. A galvanometer of resistance $100 Ω$ gives full scale deflection at $10 m A$ current. What should be the value of shunt so that it can measure a current of $100 m A$ ?

$11.11 Ω$

$1.1 Ω$

$9.9 Ω$

$4.4 Ω$

$S = \frac{10 \times 1 0 ^{- 3} \times 100}{( 100 - 10 ) \times 1 0 ^{- 3}}$
$= \frac{1000}{90} = 11.11 Ω$

Q. A galvanometer of resistance 100Ω gives full scale deflection at 10mA current. What should be the value of shunt so that it can measure a current of 100mA ?

11.11Ω

1.1Ω

9.9Ω

4.4Ω