First slide

Magnetic flux and induced emf

Question

A coil of 100 turns and area 5 square centimetre is placed in a magnetic field B = 0.2 T. The normal to the plane of the coil makes an angle of 60° with the direction of the magnetic field. The magnetic flux linked with the coil is

Moderate

A

$5 \times 10^{- 3} Wb$
B

$5 \times 10^{- 5} Wb$
C

$10^{- 2} Wb$
D

$10^{- 4} Wb$

Solution

$\begin{array}{l} ϕ = NBAcos θ = 100 \times 0 .2 \times 5 \times 10^{- 4} \cos 60^{\circ} \\ = 5 \times 10^{- 3} Wb \end{array}$

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