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Q.

A galvanometer of resistance  G is converted into a voltmeter of range  0−1V by connecting a resistance  R1 in series with it. The additional resistance that should be connected in series with  R1 to increase the range of the voltmeter to 0−2V will be:

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a

G

b

R1

c

R1−G

d

R1+G

answer is D.

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Detailed Solution

Case 1 : iR1+G=1​Case 2 :iR1+x+G=2⇒x = R1+G
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