Q4)
a) A freely suspended magnet rests in
- East-west direction
- North-south direction
- North-east direction
- North-west direction
b) Electromagnets are made up of
-
Steel
-
Copper
-
Brass
-
Soft iron
c) An electromagnet is used in
-
Electric oven
-
Ammeter
-
Electric bell
-
Radio set
d) The purpose of armature in an electric bell is
-
To make and break the circuit
-
To produce sound
-
To produce magnetic field
-
To provide spring action
e) In a torch, the source of electricity is
-
The bulb
-
The switch
-
The cell
-
The mains
f) Electricity can flow through
-
Wood
-
Rubber
-
Plastic
-
Copper wire
g) Electricity does not flow through
-
Human body
-
Animal body
-
Rubber
-
Silver
h) We should not touch the switch with wet hands otherwise
-
Electricity may pass through our body
-
Electricity may not pass through the appliance
-
Circuit may break
-
The switch may get off