chapter 12 Electricity and Circuits

Cell is a device which

• converts chemical energy into electrical energy

• electrical energy into light energy

• electrical energy into magnetic energy

• None of these

A bulb has

• two terminals and one filament

• two terminals and two filaments

• multiple terminals and single filament

• single terminal and single filament

Filament of a bulb is made up of

• aluminum

• chromium

• platinum

• tungsten

Bulb glows only in

• closed circuit

• open circuit

• in both circuits

• open circuit if bulb is not fused

A battery is

• a single cell

• a combination of cells in which cells are joined (+) to (-)

• a combination of cells in which cells are joined (+) to (+)

• None of these

A substance which allows electricity to pass through it is called

• a conductor

• an insulator

• semiconductor

• superconductor

Which is an example of an insulator

• aluminum

• tap water

• Bakelite

• All of these

An example of a conductor is

• tap water

• salt solution

• metal wire

• all of these

How many terminals are there in a dry cell?

• 1

• 2

• 3

• 4

To prevent electric shocks, the metallic electrical wires are covered with

• paper

• plastic

• cotton

• aluminum