In the circuit shown below, when the key is closed, the magnetic compass needle placed in the matchbox deflects. Name the force which causes this deflection.

Electrostatic force

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Frictional force

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Magnetic force

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Gravitational force

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Solution

The correct option is C Magnetic force

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Will the compass needle show deflection when the switch in the circuit shown in the figure is closed?

Name three liquids, which when tested in the manner shown in Fig. 14.9, may cause the magnetic needle to deflect.

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