Test Preparation on Physics-Alternating Current

A capacitor of capacitance C farad is charged by a battery of e.m.f ???????? volt. The battery is then disconnected and a pure inductor of Lhenry is connected across it so that LC oscillations are set up. Then the frequency of oscillations is:

A rectangular loop of wire is placed in a uniform magnetic field B acting normally to the plane of the loop. If we attempt to pull it out of the field with a velocity v, the power needed is:

A bulb is connected in series with an inductance and a 6V d.c. source as shown in figure. A soft iron core is inserted in the coil quickly. During this Process, the intensity of bulb: