Electromagnetic Induction questions
610 published questions with worked solutions.
- A horizontal conductor along east west direction falls under gravity, then there is:
- If a rod of length L is rotating about its one end in a plane perpendicular to magnetic field B, if it makes n revolutions in...
- If the magnetic field is doubled through a coil of number of turns, then the induced emf will be:
- If the magnetic flux linked with the coil of unit area is tripled in 0.5 s, the induced emf across the coil is (B - magnetic...
- A conductor of length 20 m is moved parallel to itself with a speed of 20 m/s at right angle to a magnetic induction of 10^ -4...
- The emf induced in a coil, if flux associated with it varies at the rate of 1 Wb/min, will be:
- The magnetic flux (in Wb) in a closed circuit of resistance 10 , varies with time according to the equation =6t^2-5t+1, the...
- A straight rod of length 4 m moves at a speed of 10 m/s. When the conductor makes an angle of 30° with the field of magnetic...
- A copper disc of radius 0.1 m rotated about its center with 10 revolutions per second in a uniform magnetic field 0.1 T with its...
- A meter gauge train is running due to north with a speed of 20 m/s. If the vertical component of earth's magnetic induction is 3...
- A wheel with 10 metallic spokes each of 1 m long rotated with a speed of 120 revolutions/minute in a plane normal to magnetic...
- A meter rod, rotating about an end in a plane perpendicular to a uniform magnetic field of induction 3 10^ -4 Wb/m^2 , generates...
- The magnetic field is doubled through a coil of number of turns n, then the induced emf will be:
- A straight conductor of length 4 m moves at a speed of 10 m/s when the conductor makes an angle of 30° with the direction of...
- The circulating induced current produced in a metal plate due to the change in magnetic flux area is called
- Eddy currents are developed, when
- The heating effect of eddy currents is used for melting a metal in an induction furnace. The metallic solid is placed in a:
- In the presence of a changing magnetic field, the conductor having large dimensions induces:
- Eddy currents are induced in a conductor when the conductor is kept in:
- The coefficient of self inductance of a coil is
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