Question

A miliammeter whose resistance is 120 ohm has full scale deflection with a current of 5 A. How will you use it to measure the maximum current of 100 A? find the resistance of the ammeter so formed​

Answer 1

Explanation:

Resistance of shunt: S=

I−I

g

R

g

I

g

Here, R

g

=5 Ω, I

g

=0.015 A, I=1.5 A

⇒S=

1.5−0.015

5×0.015

=

99

5

⇒S=0.0505 Ω

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