A coil connected to a battery is placed (primary coil) is placed next to another coil (secondary coil) connected to a galvanometer (no battery). What will you observe when:

i) Current in the primary coil is switched on

ii) Current becomes steady in the primary coil

i) Deflection is observed in the galvanometer and ii) Deflection in the galvanometer remains constant

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i) No deflection is observed in the galvanometer and ii) Deflection is observed in the galvanometer

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i) The needle of the galvanometer remains at zero mark and ii) Deflection is observed in the galvanometer

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i) Deflection is observed in the galvanometer and ii) No deflection is observed in the galvanometer

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i) Deflection is observed in the galvanometer and ii) Deflection in the galvanometer is in the opposite direction

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Solution

The correct option is D
i) Deflection is observed in the galvanometer and ii) No deflection is observed in the galvanometer

i) Current is induced in the secondary coil in a direction opposite to that of primary current.

ii) No Current is induced in the secondary coil.

Also if the current in the primary coil is switched off then:

Current is induced in the secondary coil in a direction same as that of primary current.

When an emf is produced in a secondary coil because of the change in current in a coupled coil (primary coil), the effect is called mutual induction which is a special type of electromagnetic induction.

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A coil connected to a battery is placed (primary coil) is placed next to another coil (secondary coil) connected to a galvanometer (no battery). What will you observe when: i) Current in the primary coil is switched on ii) Current becomes steady in the primary coil

A coil connected to a battery is placed (primary coil) is placed next to another coil (secondary coil) connected to a galvanometer (no battery). What will you observe when:

i) Current in the primary coil is switched on

ii) Current becomes steady in the primary coil