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yarga [219]
4 years ago
8

A rectangular wire loop is pulled out of a region of uniform magnetic field B at a constant speed v. What is true about the indu

ced emf in the loop while the loop is pulled out of the region of uniform magnetic field
Physics
1 answer:
Paul [167]4 years ago
5 0

Answer:

There is a constant emf induced in the loop.

Explanation:

In the uniform magnetic field suppose the rectangular wire loop of length L and width b is moved out with a uniform velocity v. suppose any instance x length of the loop is out of the magnetic field and L-x length is inside the loop.

Area of loop outside the field = b(L-x)

we know that flux φ= BA

B= magnitude of magnetic field , A=  area

and emf \epsilon= \frac{d\phi}{dt}

\epsilon=B\frac{dA}{dt}

\epsilon=B\frac{db(L-x)}{dt}

\epsilon=Bb\frac{d(L-x)}{dt}

B,b and L are constant and dx/dt = v

⇒ε = -Bbv

which is a constant hence There is a constant emf induced in the loop.

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