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Q.

A voltmeter of resistance 1000  Ω gives full scale deflection when a current of 100 mA flows through it. The shunt resistance required across it to enable it to be used as an ammeter reading 1 A at fulI scale deflection, is

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a

10000  Ω

b

9000  Ω

c

222  Ω

d

111  Ω

answer is D.

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Detailed Solution

By using iig =1+  GS⇒   1100 ×  10−3 =1+1000S ⇒  S=10009=111Ω
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