Longer line in the symbol for a cell represents its _______ terminal.

The combination of two or more cells is called a .

When current is switched ‘on’ in a room heater, it

The safety device based on the heating effect of electric current is called a

To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell.

• true

• false

When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks.

• true

• false

An electromagnet does not attract a piece of iron.

• true

• false

An electric bell has an electromagnet.

• true

• false

What is electric current?

• flow of electrons.

• flow of electro magnet

Why does light bulb get hot?

• Hans Christian Oersted discovered magnetic effect of current.

• Light bulb gets hot due to heating effect of the electric current.