The metal detectors that are used in malls, stations, airports and other commercial areas have

In DC motor, the coil between two carbon rods or other contacts to which electric current is fed, is called

The coil sits between the north and the south pole of the

Most of the electric appliances get energy from

Air and water can conduct electricity only, when they contain

Magnetic effect is present in

Resistors can be connected in

"ELCB" switches off when current in the earth wire is greater than

If one bulb goes out in parallel circuit, the others will

Iron bar is pulled back to its original position by

A material which loses electrons, becomes

An example of good electrical conductor is

ELCB is also switched off if

One of the cause of short circuits is

The main supply system has plugs with

The resistor whose resistivity can be varied manually is known as

The most common process for manufacturing products from salt solution is

To reduce the flow of current in an electric circuit and to avoid the danger of overheating resistor is used in a circuit which is called

In 1 minute, a 500W toaster consumes five times more energy than a

When switch is closed, the magnet pulls out the

Bulbs give off electrical energy in the form of

An ammeter which is easy to read is

When William turned the switch on, the bar of iron became a

The wires used by simple circuits are

When water is electrolyzed, at anode collected gas is

The change in the strength of a magnetic field produces

The second thing on which used amount of energy depends, is

The electromagnetic effect of track and train

For safety, appliances should be equipped with

The electrons flow from one terminal to other is due to