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Solution


Q.

The value of current I in the electrical circuit as given below, when potential at A is equal to the potential at B, will be ______ A.          [2025]

Ans.

(2)

VA=VB ⇒ the bridge is balanced

⇒ 10R=2040 ⇒ R=20Ω

⇒ I=4020=2A