Electromagnetic Induction questions
610 published questions with worked solutions.
- A square loop of area 25 cm^2 has a resistance of 10 . The loop is placed in uniform magnetic field of magnitude 40 T. The plane...
- A coil having effective area 'A' is held with its plane normal to a magnetic field of induction 'B'. The magnetic induction is...
- A magnetic flux through a circuit of resistance 'R' changes by an amount in the time t. The total quantity of electric charge 'Q'...
- The self inductance 'L' of a solenoid of length 'l' and area of cross-section 'A', with a fixed number of turns 'N' increases as
- If number of turns per unit length in a solenoid is tripled, the self inductance of solenoid will
- A 1 capacitor is charged to 50 V and is then discharged through 10 mH inductor of negligible resistance. The maximum current in...
- When the number of turns in a coil is doubled without any change in the length of the coil, its self-inductance
- A boat is moving due east in a region where the earth's magnetic field is 3.6 10^ -5 N Am due north and horizontal. The boat is...
- 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 6A...
- The magnetic flux through a coil of resistance 'R' changes by an amount ' ' in time ' t'. The total quantity of induced electric...
- Self induction of a solenoid can not be increased by
- A toroid is a long coil of wire (N turns) wound over a circular core. The coefficient of self induction of the toroid is [The...
- SI unit of self-inductance is
- An air craft of wing span 40 m flies horizontally in earth's magnetic field 5 10^ -5 T at a speed of 500 m/s. The e.m.f....
- Two coils have a mutual inductance of 0.004 H. The current changes in the first coil according to equation I = I_0 t, where I_0 =...
- Two inductors of 60 mH each are joined in parallel. The current passing through this combination is 2.2 A. The energy stored in...
- A conducting loop of radius 10/[ ]^ 1/2 cm is placed perpendicular to a uniform magnetic field 0.5 T. The magnetic field is...
- A metal disc of radius 'R' rotates with an angular velocity ' ' about an axis perpendicular to its plane passing through its...
- A conductor 10 cm long is moved with a speed 1 m/s perpendicular to a field of strength 1000 A/m. The e.m.f. induced in the...
- A long solenoid has 1500 turns. When a current of 3.5 A flows through it, the magnetic flux linked with each turn off solenoid is...
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