EASY
7th CBSE
IMPORTANT
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An electric fuse consists of a metal wire.
The wire breaks the electric circuit when the electricity load is too high.

What makes the wire break when the electricity load is too high?
The wire breaks the electric circuit when the electricity load is too high.

(a)It is made of metal.
(b)It has a low melting point.
(c)It is a good conductor of heat.
(d)It is a good conductor of electricity

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Important Questions on Electric Current and Its Effects
EASY
7th CBSE
IMPORTANT
Why does the filament of a bulb glow when connected to an electric circuit?

EASY
7th CBSE
IMPORTANT
Which of these can cause a fire in an electric circuit?

EASY
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IMPORTANT
Which of these labels on an electric device confirms standard quality?

EASY
7th CBSE
IMPORTANT
Which of these consumes the least electricity for producing the same amount of light?

EASY
7th CBSE
IMPORTANT
The picture shows steel clips being attracted to an iron nail in an electric circuit.
Which effect of electric current attracts the steel clips to the iron nail?

EASY
7th CBSE
IMPORTANT
In which of these devices is an electromagnet used?

HARD
7th CBSE
IMPORTANT
The diagram shows a flashlight battery and a bulb connected by wires to various substances. Which of the bulbs will light?

HARD
7th CBSE
IMPORTANT
See the circuit shown below in figure P. If the battery is connected the other way (as shown in figure Q), what will happen?
