Which is an example of an insulator?
bakelite
aluminium
tap water
all of these
Bulb glows only in
closed circuit
open circuit
in both circuits
open circuit if bulb is not fused
The device that makes contact between two terminals is called
Filament
Circuit
Switch
Cell
Which of these are used to produce an electric current?
Running water
Steam
Wind
All of these
An example of a conductor is
salt solution
metal wire
Which of these is a set of good electrical insulators?
Graphite, wood, rubber
Rubber, glass. wood
Pure water, wood, silver
Copper, iron, silver
A bulb has
two terminals and a filament
two terminals and two filaments
multiple terminals and single filament
single terminal and a filament
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 the following statement is correct for switch?
It controls flow of electricity
It controls brightness of a bulb
It controls power of the batteries
It fuses a bulb
Cell is a device which
converts chemical energy into electrical energy
electrical energy into light energy
electrical energy into magnetic energy
none of these
