In the figure given below, a coil is placed between two permanent magnets and it rotated with the help of an axle on which two rings R1 and R2 are internally attached. B1 and B2 represent metallic brushes. G represents the galvanometer.

As the coil starts to rotate, the current flows through ABCD as shown. The coil starts rotation in:

Clockwise direction

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Anti-clockwise direction

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Direction of rotation does not matter.

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Can't be said.

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Solution

The correct option is A
Clockwise direction

Fleming's Right-hand rule shows the direction of induced current when a conductor attached to a circuit moves in a magnetic field. The right hand is held with the thumb, index finger and middle finger mutually perpendicular to each other (at right angles), as shown in the diagram.

Now, using Fleming's right-hand rule, point your index finger of your right hand towards the direction of magnetic field i.e. from north to south. Middle finger towards the direction of the current. You can now see that the thumb points upwards which tell that the coil rotates in clockwise direction.

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