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Q.

The resistance to be used to convert a 50Ω resistance galvanometer of 10 mA into 500 V range voltmeter is

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a

50Ω should be connected in series

b

49,950Ω should be connected in series

c

50Ω should be connected in parallel

d

none of the above

answer is A.

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Detailed Solution

V = ig(G+R) ; V = 500v, G =50Ω, ig = 10mA
500=10 x 10-3 (50+R) ; R= 49,950Ω

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