Which of these will generate electric current when kept in sunlight but not when kept in the dark?
Dry cell
Car battery
Button cell
Solar cell
Which of these is a set of good electrical insulators?
Graphite, wood, rubber
Rubber, glass. wood
Pure water, wood, silver
Copper, iron, silver
Which is an example of an insulator?
bakelite
aluminium
tap water
all of these
A substance which allows electricity to pass through it is called
a conductor
an insulator
semiconductor
superconductor
Bulb glows only in
closed circuit
open circuit
in both circuits
open circuit if bulb is not fused
An example of a conductor is
salt solution
metal wire
Which of these are used to produce an electric current?
Running water
Steam
Wind
All of these
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 the above
How many terminal are there is a dry cell?
One
Two
Three
Four
The device that makes contact between two terminals is called
Filament
Circuit
Switch
Cell
