Electromagnetic Induction questions
610 published questions with worked solutions.
- When three inductors of same inductance 'L' are connected in series and 'I' is the current passing through the circuit. The...
- The self-inductance of a circuit is numerically equal to
- The magnetic energy stored in an inductor of inductance 4 H carrying a current of 1.5 A is
- A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid,...
- Magnetic flux linked with the coil in weber is given by the equation = 5t^2 + 6t + 11. The e.m.f. induced in the coil in the 5^...
- Consider two coils in which a current in one coil carrying 6 A causes the change in the flux in the second coil 12 10^ -4...
- A simple pendulum with bob of mass m and conducting wire of length L swings under gravity through an angle . The component of...
- The coefficient of mutual induction is 2 H and induced e.m.f. across secondary is 2 kV. Current in the primary is reduced from 6...
- An aeroplane having a wing span of 30 m flies due north with the speed of 170 m/s. Magnetic field B = 3.6 10^ -5 T. The potential...
- A circular disc of radius 20 cm is placed in uniform magnetic field of induction 7 22 Wb/m^2 in such a way that its axis makes an...
- A coil of effective area 3 m^2 is placed at right angles to a magnetic field of induction 0.05 Wb/m^2. If the field is decreased...
- The self inductance of an air-core inductor (solenoid) is 0.03 mH. By introducing an iron core into inductor the self-inductance...
- What is the phase difference between the flux linked with a coil rotating in a uniform magnetic field and the induced e.m.f....
- A coil is wound on a core of rectangular cross-section. If all the linear dimensions of core are increased by a factor 3 and...
- To manufacture a solenoid of length ' ' and inductance 'L', the length of the thin wire required is (Diameter of the solenoid is...
- Initially a rectangular coil with length vertical is moving out with constant velocity 'v' in a constant magnetic field 'B'...
- Two coils P and Q are kept near each other. When no current flows through coil P and current increases in coil Q at the rate of...
- The total charge induced in a conducting loop when it is moved in a uniform magnetic field depends on
- A copper ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The...
- A coil of resistance 400 is placed in a magnetic field. If the magnetic flux ' ' (Wb) linked with the coil varies with time 't'...
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