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Did you know the average porcupine has 30,000 spikes.

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Class VII >> Science >> Electric Current and its Effects >> A1

Q1	__________ allows the flow of electric charge through itself easily.
A	Superconductor
B	Conductor
C	Insulator
D	Semiconductor

Q2	When an electric current flows through a wire, it gets heated. This is the __________ effect of the current.
A	Heating
B	Magnetic
C	Chemical
D	None of the Above

Q3	Which of the following is a safety device?
A	An Electric Fuse
B	Battery
C	An Electric Bulb
D	A Solenoid

Q4	A circuit diagram is used to represent the components of an __________.
A	Electric Bell
B	Electric Circuit
C	Electric Switch
D	Electric Bulb

Q5	Which of these is used to start and stop the flow of electric current in the circuit?
A	Cell
B	Battery
C	Switch
D	Fuse

Q6	Which of the following is an example of insulator of electricity?
A	Copper
B	Aluminium
C	Plastic
D	Silver

Q7	A hammer, a soft iron strip and a gong are parts of __________.
A	An Electric Fuse
B	An Electric Iron
C	An Electric Bell
D	A Loudspeaker

Q8	Name the appliance in which the heating effect of current is used.
A	Electric Toaster
B	Electric Iron
C	Electric Oven
D	All of the Above

Q9	If two objects with the same charge are brought closer, they will __________ each other.
A	Sometimes Repel
B	Always Attract
C	Always Collide
D	Always Repel

Q10	Which material is used as filament in electric bulbs?
A	Steel
B	Copper
C	Tungsten
D	Aluminium

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