A substance which allows electricity to pass through it is called
a conductor
an insulator
semiconductor
superconductor
The device that makes contact between two terminals is called
Filament
Circuit
Switch
Cell
An example of a conductor is
tap water
salt solution
metal wire
all of these
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
Bulb glows only in
closed circuit
open circuit
in both circuits
open circuit if bulb is not fused
Filament of s bulb is made up of
aluminium
chromium
platinum
tungesten
Which of these are used to produce an electric current?
Running water
Steam
Wind
All of these
An electric current flows if there is
Source of electric current
A source of electric current and a metal wire
A source of electric current, a conducting wire connected in an unbroken one terminal of the source a bulb and a conducting wire connected to the other terminal of the electric source.
All the conditions given above are true.
How many terminal are there is a dry cell?
One
Two
Three
Four
Which of these is a set of good electrical insulators?
Graphite, wood, rubber
Rubber, glass. wood
Pure water, wood, silver
Copper, iron, silver
