Problems on Solenoid

Field due to Solenoid||Toroid

Self inductance of a solenoid varies……………………as the ………………of the number of turns in the solenoid.

When the current through a solenoid increases at a constant rate, the induced current in the solenoid

Toroid is a solenoid of

Assertion: Intensity of magnetic field due to a solenoid near its ends is only half of its magnitude inside the solenoid. Reason: If solenoid is made very long then magnetic field inside the solenoid becomes uniform.

Asseration: An emf is induced in a along solenoid by a bar magnet that moves while totally inside it along the solenoid axis. Reason: As the magnet moves inside the solenoid the flux through individual turns of the solenoid changes.

Two solenoids, 'P' and 'Q' are taken. The coil in solenoid 'P' is wound over a wooden cylindrical core and the coil in solenoid 'Q' is wound over a soft iron core. In which solenoid is the magentic field stronger.

Two toroidal solenoids are wound around the same pipe so that the magnetic field of one passes through the turns of the other. Solenoid 1 has 700 turns and solenoid 2 has 400 turns. When the current in solenoid 1 is 6.52 A , the average flux through each turn of solenoid 2 is 0.0320 Wb . (a) What is the mutual inductance of the pair of solenoids? (b) When the current in solenoid 2 is 2.54 A , what is the average flux through each solenoid 1?