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A currrent of 0.1 A enters a Wheatstone...

A currrent of 0.1 A enters a Wheatstone bridge from a source of the electricity . The resistance of each of the first three arms of the bridge is `10Omega` and the resistance of its fourth arm is `20Omega` . If the resistance of the galvanometer be `100Omega` what will be the galvanometer current ?

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The correct Answer is:
1.8mA
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