A circuit has a self inductance of 1 H and carries a current of 2 A. To prevent sparking when the circuit is broken, a capacitor which can withstand 400 V is used. The capacitance of the capacitor is 

If a current is passed through a spring, then the spring

What is the coefficient of mutual induction when the magetic flux changes by 2 x 10^-2 Wb and change in current is 0.01A?

A magnet is allowed to fall through a metallic ring. During fall, its acceleration is

In a current carrying coil the enery is  stored as which of the following form ? 

A current carrying solenoid contains an iron rod inside it. A current flows in the solenoid due to a DC source, of constant emf, connected across the ends of the solenoid. When the rod is pulled out of the solenoid, then the current in the solenoid will

A coil is wound in a transformer of rectangular cross-section. If all the linear dimensions of the transformer are increased by a factor of 3 and the number of turns per unit length remains the same, the self inductance increases by a factor of :

The north pole of a long horizontal bar magnet is being brought closer to vertical conducting plane along the perpendicular direction. The induced current in the conducting plane is 

A coil of resistance R and inductance L is connected to a battery of e.m.f. E volts. The final current in the coil is 

A coil has an area of 0.05 m² and has 800 turns. After placing the coil in a magnetic field of strength 4 x 10^-5 Wbm^-2, perpendicular to the field, the coil is rotated by 90^o in 0.1s.The average emf induced is :