Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 15

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If given arrangement is moving towards left with speed $v$ , then potential difference between $B$ and $D$ and current in the loop are respectively

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Important Questions on Electromagnetic Induction

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 16

A copper rod of length

l

is rotating about mid-point of rod, perpendicular to the magnetic field

B

with constant angular velocity

ω

. The induced emf between the two ends is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 17

A semicircular loop of radius $R$ is rotated with an angular velocity $ω$ perpendicular to the plane of a magnetic field $B$ as shown in the figure. Emf induced in the loop is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 18

A force of

10 N

is required to move a conducting loop through a non-uniform magnetic field at

2 {ms}^{- 1}

. The rate of production of electrical energy (in watt) in loop is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 19

A flexible wire bent in the form of a circle is placed in a uniform magnetic field perpendicular to the plane of the circle. The radius $r$ of circle changes with time $t$ as shown in the figure. The graph of magnitude of induced emf $| e |$ versus time in the circle is represented by

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 20

Radius of a circular loop placed in a perpendicular uniform magnetic field is increasing at a constant rate of

r_{0} {ms}^{- 1}

. If at any instant radius of the loop is

r

, then emf induced in the loop at that instant will be

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 21

A conducting ring of radius $b$ is placed coaxially in a long solenoid of radius $a(b<a)$ having $n$ turns per unit length. A current $i=i_{0} \cos \omega t$ flows through the solenoid. The induced emf in the ring is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 22

In what form is the energy stored in an inductor?

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>EXERCISE>Q 23

Which of the following pairs of coils has zero coupling constant?