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A thin conducting circular ring (radius r) is rotated with angular velocity ω in its own plane about its axis, in a region of uniform magnetic field B. The emf induced in the ring is

Important Questions on Electromagnetic Induction

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-1>Q 12
Lenz's law is conservation of mechanical energy. (True/false)
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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-1>Q 13
Mutual induction of the two coil depends upon rate of change of current in one coil. (True/false)
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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-1>Q 14
Work done upon a charged particle in a region of induced electric field, from one point to another depends upon the path followed. (True/false)
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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-1>Q 15
In AC generators, when flux passing through the armature coil is maximum, the emf induced in the coil is also maximum. (True/false)
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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-1>Q 16
The motional emf (due to the motion of a conductor, In perpendicular magnetic fleld) Is due to the magnetic force upon the mobile charged particles due to magnetic field. (Yes/no)
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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-1>Q 17
Consider the case when a bird is flying with 10 ms-1 where the perpendicular component of earth's magnetic field is 40μT. Find the emf induced between two points upon bird's wing separated by 2 cm. Assuming ALL the vectors to be mutually perpendicular to each other.
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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-1>Q 18
A small coil of area 5 cm2, number of turns 50 is kept normal to a uniform magnetic field B tesla. The coil is rotated about its diameter through 180°, in 15 ms . The total charge flow is 50mC. Find B, assume resistance R=10Ω.
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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-1>Q 19
Derive the expression for the self inductance of a section of a long solenoid and hence show that self inductance is proportional to the square of number of turns per unit length.