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A current is induced in coil C_1 due to the motion of current carrying coil C_2. <br> (a) Write any two ways by which a large deflection can be obtained in the galvanometer G. (b) Suggest an altermative device to demonstrate the induced current in place of galcanometer. <br> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/SB_PHY_XII_11_DB_E01_019_Q01.png" width="80%">

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Answer Text

Solution :
(a) (i) Two ways are : When coil `C_1 and C_2` held stationary. Coil `C_1` is connected to a sensitive galcanometer G and coil `C_2` is connected to a battery through a tapping key K. <br> (ii) When the key is released, the galvanometer shows again a momentary deflection, but in the opposite direction. The pointer in the galvanmeter returns to zero almost instantly. <br> (b) The galvanometer deflection increases dramatically, when an iron rod is inserted into the coils along their exis.

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