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Meter Bridge

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Question

The current sensitivity of a moving coil galvanometer is 5 divisions per milliampere and voltage sensitivity is 20 divisions per volt find the resistance of the Galvanometer

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Solution

To calculate the same deflections, either multiply the current by 4, or divide the voltage by 4, then use Ohm’s law to compute the resistance by Voltage/Current

R = (1V/4) / 1e-3A

= 250e-3/1e-3

= 250 Ohm

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