Question

A coil of area 400 cm2 and 1000 turns is laying perpendicular to magnetic field of 0.3 gauss. The coil is turned through 180° in 1/20sec Find the induced emf

Answer 1

Explanation:

Given, A=500cm

2

=500×10⁻⁴=0.05m

2

Number of turns=N=1000

Magnetic field =B=0.4G=0.4×10⁻⁴T

∆t = time taken=1/10=0.1 sec

Coil turned θ=0

0

toθ=180

0

as shown in figure.

Change in flux =

so, change in flux =ΔΦ=−2NBA

We know,

Where Eav is average induced emf

So, Eav=2NBA/∆t

=2×1000×0.4×10⁻⁴×0.05/0.1

=0.04V

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Answer 2

Answer:

0.04v

Explanation:

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