An ammeter, whose resistance is 50 Ω can read upto 10 mA. In order to increases its range to 1 A. What should be the shunt resistance?

Question

An ammeter, whose resistance is 50 Ω can read upto 10 mA. In order to increases its range to 1 A. What should be the shunt resistance? (A) 0.5050 Ω  (B) 5.050 Ω  (C) 50.50 Ω  (D) 505.05 Ω

Tardigrade Admin · Accepted Answer

To increase the range of ammeter a suitable resistance (shunt) should be connected in parallel. Let resistance of shunt wire =S S=(ig × G/i-ig) S=(10 × 10-3 × 50/1-(10 × 10-3)) =0.5050 Ω

Q. An ammeter, whose resistance is $50 Ω$ can read upto $10 m A$ . In order to increases its range to $1 A$ . What should be the shunt resistance?

$0.5050 Ω$

$5.050 Ω$

$50.50 Ω$

$505.05 Ω$

To increase the range of ammeter a suitable resistance (shunt) should be connected in parallel.
Let resistance of shunt wire $= S$
$S = \frac{i _{g} \times G}{i - i _{g}}$
$S = \frac{10 \times 1 0 ^{- 3} \times 50}{1 - ( 10 \times 1 0 ^{- 3} )}$
$= 0.5050 Ω$

Q. An ammeter, whose resistance is 50Ω can read upto 10mA. In order to increases its range to 1A. What should be the shunt resistance?

0.5050Ω

5.050Ω

50.50Ω

505.05Ω