A galvanometer has a coil of resistance 100 ohm and gives a full scale deflection for 30 
current. If it is work as a voltmeter of 30 volt range, the resistance required to be added will be
A
900 
B
1800 
C
500 
D
1000 
.
.
Text Solution
Verified by ExpertsThe correct answer is:
A
Here, Resistance of galvanometer,
Current for full scale deflection, 
Range of voltmeter, 
To convert the galvanometer into an voltmeter of a given range, a resistance R is connected in series with it as shown in the figure.
From figure, 
or 
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