Electromagnetic Induction questions
610 published questions with worked solutions.
- A wire of length 50 cm moves with a velocity of 300 m/min, perpendicular to a magnetic field. If the e.m.f. induced in the wire...
- A boat is moving due east in a region where the earth's magnetic field is 5.0 10^ -5 NA^ -1 m^ -1 due north and horizontal. The...
- A circular wire of radius r rotates about its own axis with angular speed in a magnetic field B perpendicular to its plane, then...
- If rotational velocity of a dynamo armature is doubled, then induced e.m.f. will become [MP PMT 1991, AIIMS 2000]
- The magnetic flux linked with coil, in weber is given by the equation, = 5t^2 + 3t + 16. The induced e.m.f. in the coil in the...
- An aircraft with a wingspan of 40 m files with a speed of 1080 km/hr in the eastward direction at a constant altitude in the...
- Magnetic flux (in weber) linked with a closed circuit of resistance 10 ohm varies with time t (in seconds) as = 5t^2 - 4t + 1....
- For a coil of unit area, induction is doubled in 0.2 s. Then, the induced e.m.f. is
- A coil of resistance 400 is placed in a magnetic field. If the magnetic flux (wb) linked with the coil varies with time t(s) as =...
- A coil is suspended in a uniform magnetic field, with the plane of the coil parallel to the magnetic lines of force. When a...
- Choke coil works on the principle of [MP PET/PMT 1988]
- In a coil, L = 5 H, current changes at the rate of 2 ampere per second. The e.m.f. induced
- An average induced e.m.f. of 1 V appears in a coil when the current in it is changed from 10 A in one direction to 10 A in...
- An e.m.f. of 5 volt is produced by a self inductance when the current changes at a steady rate from 3 A to 2 A in 1 millisecond....
- The current passing through a choke coil of 5 henry is decreasing at the rate of 2 ampere/s. The e.m.f. developing across the...
- Two coils have a mutual inductance 0.005 H. The current changes in the first coil according to the equation I = i_m t where i_m =...
- The inductance of a closed-packed coil of 400 turns is 8 mH. A current of 5 mA is passed through it. The magnetic flux through...
- A varying current in a coil changes from 10 A to zero in 0.5 s. If the average e.m.f induced in the coil is 220 V, then the...
- If a current of 10 A flows in one second through a coil and the induced e.m.f. is 10 V, then the self-inductance of the coil is
- A long solenoid has 500 turns. When a current of 2 ampre is passed through it, the resulting magnetic flux linked with each turn...
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