Fluorescent tubes are fitted with a choke. The choke coil-

Damaged C.F.L. and fluorescent tubes must be disposed safely as they contain _______________ vapours that are toxic in nature.

Two resistances of 5 Ω and 7 Ω are connected in series and the combination is connected in parallel with a resistance of 36 Ω. The equivalent resistance of the combination of three resistors is

If the speed of a moving magnet inside a coil increases, the electric current in the coil

The electric field lines from an isolated positively charged conducting sphere are

An electric wire of resistance 50 ohm is cut into five equal wires. These wires are then connected in parallel. What is the equivalent resistance of this combination?