Chapter 14

If a positive terminal of one cell is connected to the negative terminal of the next cell it is known as

• Electric current

• Fuse

• Battery

• Element

Which of these following cannot be harmed by electric current

• plastic

• Rubber

• A&B

• All of the above

Wires made from some special materials melt quickly and break when a large electric current passes through it.these wires are used to make

• Fuses

• Electric fuses

• A&B

• Electromagnet

·Who was the first person to notice the deflection of compass needle everytime the current passes through the wire.

• Hans Christian Andersen

• Hans Christian oersted

• Hans Christian mandorson

• None of the above

The amount of heat produced in a wire depends on

• Material

• Length

• Thickness

• All of these

The coil of wire contained in an electric heater is known as:

• Component

• Element

• Circuit

• Spring

A ______ is a safety device which prevents damage to electrical circuits and possible fires

• MCB

• Fuse

• Switch

• Car Key

A combination of two or more cells is called

• A button cell

• A battery

• An electric cell

• Truck battery

When electricity flows through heating coil it becomes ________ hot and gives out _______ energy, which is to put in practical use.

• Red, heat

• White, heat

• Red, light

• White, light

What is the symbol for a cell?

• 
• 
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