MEDIUM
NEET
IMPORTANT
Earn 100
Two inductors having inductances and are connected
in parallel. What is their equivalent?
Important Questions on Electromagnetic Induction
MEDIUM
NEET
IMPORTANT
If resistances in circuit (a) of the figure shown, is decreased, what will be the direction of induced current in circuit (b)?
HARD
NEET
IMPORTANT
In the figure, and are two coils. What shall be the direction of induced momentary current in immediately after the switch is closed? If the switch is opened, after it has been closed for some time?
MEDIUM
NEET
IMPORTANT
Which factors govern the magnitude of emf induced in a coil?
HARD
NEET
IMPORTANT
A lamp in a circuit consisting of a coil of large number of turns and a battery does not light upto full brilliance instantly on switching on the circuit. Why?
MEDIUM
NEET
IMPORTANT
An electron moves in a circle with uniform speed in a stationary magnetic field normal to the plane of magnetic field. If the field magnitude is made to increase with time, will it continue to revolve in the same circle?
HARD
NEET
IMPORTANT
A wheel with a certain number of spokes is rotated in a plane normal to earth's magnetic field, so that an emf is induced between the axle and rim of the wheel. Keeping all other things same, number of spokes is changed. How is the emf affected?
HARD
NEET
IMPORTANT
A solenoid coil has turns per along its length and a cross-sectional area of Now turns of another wire are wound round the first solenoid coaxially, the two coils are electrically insulated from each other. Calculate the mutual inductance between the two coils.
HARD
NEET
IMPORTANT
A toroidal solenoid with an air core has an average radius of area of cross section and 1200 turns. Obtain the self inductance of the toroid. Ignore field variation across the cross section of the toroid.
