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CBSE Class 12 · 2016 · Magnetic Effects of CurrentVery Short Answer

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Write the underlying principle of a moving coil galvanometer.

Answer: A current-carrying coil placed in a magnetic field experiences a torque.

Solution

When current flows through the coil suspended in the radial magnetic field, it behaves as a magnetic dipole and experiences a deflecting torque . The coil rotates until this is balanced by the restoring torque of the suspension, and the deflection is proportional to the current.

CBSE Class 12 Board · 2016 · Subjective

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