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+1 vote
1.3k views
in Physics by (73.2k points)

A galvanometer of resistance 50Ω giving full scale deflection for a current of 10 milliampere is to be changed into a voltmeter of range 100 V. 

A resistance of _____Ω has to be connected in series with the galvanometer 

(A)   9950

(B)   10025 

(C)   10000 

(D)   9975

1 Answer

+1 vote
by (69.2k points)
selected by
 
Best answer

Correct option  (A) 9950

Explanation:

100 = (R + 50) × 10 × 10–3

R + 50 = 10000 

R = 9950

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