Electro- magnetism questions | form six Physics

Draw hysteresis loops diagram for soft iron and hard steel and use them to discuss permanent magnets.

Answer / Solution

UNSOLVED

Define permeability constant.

Answer / Solution

UNSOLVED

Derive an expression for the magnetic flux density B at the centre of the circular coil of radius r and N turns placed in air carrying a current I.

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UNSOLVED

The diameter of a 40 turn circular coil is 16cm and it has a current of 5A. Calculate:

1. The magnetic induction at the centre of the coil.
2. The magnetic moment of the coil.
3. The torque acting on the coil if it is suspended in a uniform magnetic field of 0.76T such that its plane is parallel to the field.

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UNSOLVED

Distinguish between self-inductance and mutual inductance.

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UNSOLVED