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Q 1.
In electric bells, electric energy changes into?
Ans.
Sound energy.
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Q 2.
An incomplete electric circuit is called?
Ans.
Open circuit.
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Q 3.
Name the two terminals of Electric cells?
Ans.
Positive and Negative.
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Q 4.
An electric bulb has filament that is connected to?
Ans.
Terminals.
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Q 5.
Name the device that converts solar energy into electrical energy?
Ans.
Solar cell.
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Q 6.
Name the device which converts chemical energy into electrical energy?
Ans.
Dry cell.
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Q 7.
Where the filament fixed in the electric bulb?
Ans.
In the middle.
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Q 8.
Name the material from which covers of electric plugs is made of?
Ans.
Insulator.
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Q 9.
How air works as insulator of electricity?
Ans.
Because it is made up of nitrogen and oxygen molecules.
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Q 10.
Two terminals of an electric cell must never be joined without connecting?
Ans.
As chemicals are used up fast.
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Q 11.
While an electrician repair an electric switch he wears rubber gloves why?
Ans.
To prevent him from shock.
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Q 12.
A thin wire that gives off light in a bulb is called?
Ans.
Filament.
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Q 13.
Give one example of insulator
Ans.
Rubber.
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Q 14.
Give one example of conductor?
Ans.
Metal.
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Q 15.
A complete electrical circuit is called?
Ans.
Closed circuit.
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Q 16.
Name the material which allow electricity to pass through it?
Ans.
Conductor.
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Q 17.
Name the material which don't allow to pass electricity through it?
Ans.
Insulator.
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Q 18.
Combination of two or more electric cells is called?
Ans.
Battery.
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Q 19.
The filament of an electric bulb is made up of?
Ans.
Tungsten.
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Q 20.
Electric current can flow through?
Ans.
Metal.
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Q 21.
How many terminals an electric cell have?
Ans.
Two terminal.
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Q 22.
Name the device that is used to break an electric circuit is called?
Ans.
Switch.
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