Select the incorrect statements :
I) When two long parallel wires, hanging freely are connected in parallel to a battery, they come closer to each other
II) Wires carrying current in opposite direction repel each other
III) Torque on the coil is always maximum, when coil is suspended in a radial magnetic field.
IV) Torque depends upon the magnitude of the applied magnetic field.

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II, III and IV

All are incorrect

II and III

I and II

answer is D.

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Detailed Solution

When two long parallel wires, hanging freely are connected in parallel to a battery, they come closer to each other Wires carrying current in opposite direction repel each other Torque on the coil is always maximum, when coil is suspended in a radial magnetic field. Torque depends upon the magnitude of the applied magnetic field.

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