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Standard XII

Physics

Magnetic Flux and Faraday's Law

A coil having...

Question

A coil having n turns and area A is initially placed with its plane normal to the magnetic field B. It is then rotated through 180 $^{o}$ in 0.2 sec. The emf induced at the ends of the coils is

0.1 nAB

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nAB

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5 nAB

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10 nAB

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Solution

The correct option is D 10 nAB
Total change in flux = $△ ϕ = 2 n A B$

total time of change = $△ t = 0.2 s$

emf induced = $\frac{△ ϕ}{△ t} = 10 n A B$

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A coil having n turns and area A is initially placed with its plane normal to the magnetic field B. It is then rotated through 180o in 0.2 sec. The emf induced at the ends of the coils is

The correct option is D 10 nABTotal change in flux =△ϕ=2nABtotal time of change = △t=0.2semf induced = △ϕ△t=10nAB

A coil having n turns and area A is initially placed with its plane normal to the magnetic field B. It is then rotated through 180 $^{o}$ in 0.2 sec. The emf induced at the ends of the coils is

The correct option is D 10 nAB
Total change in flux = $△ ϕ = 2 n A B$

total time of change = $△ t = 0.2 s$

emf induced = $\frac{△ ϕ}{△ t} = 10 n A B$