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WorksheetsElectricity and circuits --- by RITU B.
Total questions: 20
Worksheet time: 12mins
The tiny coiled metal wire present inside the bulb is called ___
Element
Conductor
Filament
None of these
A combination of two or more electric cells is called _____
Electric circuit
Battery
Terminals
None of these
An electric bulb has ____ terminals.
3
4
1
2
_____ is an electric device which easily closes or opens an electric circuit.
Filament
Electric bulb
Electric switch
Electric cell
A material which does not allow the electricity to pass through it is _____
Conductor
Electric cell
Insulator
None of these
Electric energy is produced from the ______ within the cell.
Chemicals
Metals
Terminals
None of these
The electric current in a closed circuit always flows from the ____ terminal of the electric cell to the _____ terminal.
Negative to positive
Positive to negative
Positive to positive
None of these
Why do electricians wear gloves made of rubber?
It is soft.
It is waterproof.
It is an insulator.
It is inexpensive.
If we touch a a live wire carrying current, we get a shock. This is because our body is a/an
conductor of electricity
insulator of electricity
source of electricity
None of these
Why is a switch used in a circuit?
To complete or break a circuit
To save energy
To prevent electric shocks
To make the bulb glow easily
The bulb in a circuit glows when electric current
flows through the glass covering
flows through its filament
stops flowing to the bulb
flows into the air through the bulb
What are the two places on the battery to which the wires can be attached called?
Switches
Filaments
Insulators
Terminals
Cell is a device which
converts chemical energy into electrical energy
electrical energy into light energy
electrical energy into magnetic energy
None of these
Filament of a bulb is made up of
aluminium
chromium
platinum
tungsten
Bulb glows only in
closed circuit
open circuit
in both circuits
open circuit if bulb is not fused
In an electric bulb, light is produced due to the glowing of :
gases inside glass case of the bulb.
the glass case of the bulb.
the thin filament.
the thick wires supporting the filament.
Choose the incorrect statement.
A switch is the source of electric current in a circuit.
A switch helps to complete or break the circuit
When the switch is open there is an air gap between its terminals.
Solution:
A switch helps us to use electricity as per our requirement
In the above diagram boojho says that the bulb will glow.
TRUE
FALSE
Which of the following bulbs below will light up ??
