Electromagnetic Induction questions
610 published questions with worked solutions.
- A small loop of area of cross-section 10^ -4 m^2 is lying concentrically and coplanar inside a bigger loop of radius 0.628 m. A...
- A given wire is bent into a circular loop of radius 7 cm and placed perpendicular to a magnetic field of 1.0 T. Within 0.1...
- A conducting square loop of side l and resistance R moves in its plane with a uniform velocity v perpendicular to one of its...
- In a coil of area 10 cm^2 and 10 turns, the magnetic field is directed perpendicular to the plane and is changing at the rate of...
- A coil of 50 turns is pulled in 0.02 s between the poles of a magnet, where its area includes 31 10^ -6 Wb to 1 10^ -6 Wb. The...
- An induced e. m. f. is produced when a magnet is plunged into a coil. The strength of the induced e. m. f. is independent of
- The instantaneous magnetic flux in a circuit is =4t^2-4t+1. The total resistance of circuit is 10 . At t= 12 s, the induced...
- A square loop of side 22 cm is converted into circular loop in 0.4 s. A uniform magnetic field of 0.2 T directed normal to the...
- The current induced in 100 coil when the magnetic flux decreases from 1 Wb to 0.1 Wb in 0.1 s, is
- A coil of radius 1 cm and 100 turns is placed in a magnetic field of 10^ 6 gauss such that its plane makes an angle 30^ with the...
- The magnetic flux in a closed circuit of resistance 10 varies with time according to equation, =6t^2-5t+1. What is the magnitude...
- A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then
- A rectangular coil of 100 turns and dimensions of 10 cm 5 cm is placed perpendicular to a uniform magnetic field of induction 0.1...
- A coil is wound on a frame of rectangular cross-section. If the linear dimensions of the frame are doubled and the number of...
- When the current changes from +2 A to -2 A in 0.05 second, an e. m. f. of 8 volt is induced in a coil. The coefficient of self...
- The coefficients of self-induction of two coils are L_1=8 mH and L_2=2 mH respectively. The current rises in the two coils at the...
- When the number of turns in a coil is doubled without any change in the length of the coil, its self inductance
- The number of turns in a coil of wire of fixed radius is 600 and its self inductance is 108 mH. The self inductance of a coil of...
- The coefficient of self inductance of a solenoid is 0.18 mH. If a core of soft iron of relative permeability 900 is inserted,...
- In an A.C. generator, when the plane of the armature is perpendicular to the magnetic field
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