An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of the required shunt is

Question

An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of the required shunt is (A) 0.03 Ω (B) 0.3 Ω (C) 0.9 Ω (D) 0.09 Ω

Tardigrade Admin · Accepted Answer

Q. An ammeter reads upto $1$ ampere. Its internal resistance is $0.81 o hm$ . To increase the range to $10 A$ the value of the required shunt is

$0.03 Ω$

$0.3 Ω$

$0.9 Ω$

$0.09 Ω$

$S = \frac{I _{g} G}{I - I _{g}} = \frac{1 \times 0.81}{10 - 1} = 0.09 Ω$

Q. An ammeter reads upto 1 ampere. Its internal resistance is 0.81ohm. To increase the range to 10A the value of the required shunt is

0.03Ω

0.3Ω

0.9Ω

0.09Ω

S=I−Ig​Ig​G​=10−11×0.81​=0.09Ω

Q. An ammeter reads upto $1$ ampere. Its internal resistance is $0.81 o hm$ . To increase the range to $10 A$ the value of the required shunt is

$0.03 Ω$

$0.3 Ω$

$0.9 Ω$

$0.09 Ω$

$S = \frac{I _{g} G}{I - I _{g}} = \frac{1 \times 0.81}{10 - 1} = 0.09 Ω$