PHYSICS [2 Mark Question Answer]

Parallel circuit: When the circuit is in parallel, the appliances work independently. This is the reason that in our household wiring system, all the circuits are in parallel. Every appliance when put on, works on its own without the interruption of the other appliance.

An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire.
The S.I. unit of electric current is the ampere.

The magnetic field of the electromagnet can be increase in the following two ways :

1. By inserting a rod of soft iron or steel inside the cylindrical tube. This rod is called the core.
2. By increasing the total number of turns of the coil.

The magnetic field of an electromagnet (I or U-shaped) can be increased by the following two ways :

1. By increasing the number of turns of winding in the solenoid.
2. By increasing the current through the solenoid.

End A becomes S-pole and B becomes N-pole.