3. A coil of 100 turns encloses an area of 100 cm2. It is placed at an angle of 700 with a magnetic field of 0.1 Wbm-2. What is the magnetic flux through the coil? If the magnetic
field is reduced to zero in 10-3s, what emf is induced in the coil?

Explanation:

Given that,

Number of turns in the coil, N = 100

Area of the coil, A = 100 cm² = 0.01 m²

It is placed at an angle of 70°.

Magnetic field, B = 0.1 Wb/m²

We need to find the magnetic flux through the coil and the emf is induced in the coil after 10⁻³ s.

Magnetic flux is given by :

So, the magnetic flux through the coil is 0.1 Wb.

Emf induced in the coil is :

So, 34V of emf is induced in the coil.

3.2x10^7

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