A moving coil galvanometer has a resistance of 900Ω. In order to send only 10% of the main current through this galvanometer, the resistance of the required shunt is:
A
0.9Ω
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B
100Ω
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C
405Ω
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D
90Ω
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Solution
The correct option is D100Ω Since the 10% current is required to pass through galvanometer, and 90% through the shunt, the ratio of the resistances must be RshuntRGal=19