To prevent electric shocks, the metallic electrical wires are covered with
paper
cotton
aluminium
plastic
Which of these are used to produce an electric current?
Running water
Steam
Wind
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
An example of a conductor is
tap water
salt solution
metal wire
all of these
A bulb has
two terminals and a filament
two terminals and two filaments
multiple terminals and single filament
single terminal and a filament
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
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
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