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KEAM 2017 Physics and Chemistry Paper
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© examsnet.com
Question : 64
Total: 120
Consider a circular wire loop of radius R spinning about a diametrical chord which is perpendicular to a uniform magnetic field
(
→
B
=
B
0
⋀
k
)
The magnitude of the induced EMF in the loop is maximum when the plane of the loop is perpendicular to
→
B
Flux through the loop is minimum when the plane of the loop is perpendicular to
→
B
The direction of induced current remains same during the spinning motion of the loop
EMF induced will be the same for a larger radius of the loop in the same field
No EMF will be induced since magnetic field is constant
Validate
Solution:
Given,
B
=
B
0
∧
k
The induced e.m.f,
e
=
−
d
ϕ
d
t
=
−
d
(
B
A
)
d
t
=
−
B
d
A
d
t
∵
ϕ
=
(
B
.
A
)
So, the flux linked with the circular loop of radius will be maximum, when its plane is perpendicular to the magnetic field, then the induced e.m.f will be maximum.
© examsnet.com
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