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Q.

A galvanometer of resistance 200 Ω gives full scale deflection with 15 milli-ampere current. In order to convert it into a 15 V range voltmeter, the value of resistance connected in series is

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a

800 Ω

b

1000 Ω

c

1500 Ω

d

2500 Ω

answer is A.

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Detailed Solution

We know thatR=Vig−G=1515×10−3−200∴ R=800Ω
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