EASY
12th CBSE
IMPORTANT
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How does one understand this motional emf by invoking the Lorentz force acting on the free charge carriers of the conductors? Explain.
Important Questions on Electromagnetic Induction
EASY
12th CBSE
IMPORTANT
State Faraday’s law of electromagnetic induction.
EASY
12th CBSE
IMPORTANT
A horizontal straight wire of length extending from east to west is falling with speed at right angles to the horizontal component of Earth’s magnetic field .
Write the expression for the instantaneous value of the emf induced in the wire.
EASY
12th CBSE
IMPORTANT
A horizontal straight wire of length extending from east to west is falling with speed at right angles to the horizontal component of Earth’s magnetic field .
What is the direction of the emf?
EASY
12th CBSE
IMPORTANT
A horizontal straight wire of length extending from east to west is falling with speed at right angles to the horizontal component of Earth’s magnetic field .
Which end of the wire is at the higher potential?
EASY
12th CBSE
IMPORTANT
What are eddy currents? How are they produced? Describe briefly three main useful applications of eddy currents.
EASY
12th CBSE
IMPORTANT
Derive an expression for the induced emf set up in a coil when it is rotated in a uniform magnetic field with a uniform angular velocity. Explain how does the emf vary when the coil turns through an angle of ? What is the instantaneous value of induced emf when the plane of the coil makes an angle of with the magnetic lines.
EASY
12th CBSE
IMPORTANT
Distinguish between self-induction and mutual induction. Calculate self-inductance of a long solenoid of length , number of turns and radius .
EASY
12th CBSE
IMPORTANT
Define mutual inductance. Deduce an expression for the mutual inductance of two long coaxial solenoids having different radii and different number of turns.
