NCERT Class 7 Science-Electric Current and Its Effects[Heating Effect of Electric Current] [NCERT Based General Studies (GS)]: Questions 1 - 6 of 6

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Question 1

Question MCQ▾

Electric iron and heater works on the principle of:

Choices

Choice (4)Response

a.

Heating effect of the electric current

b.

Resistance offered by the wire

c.

Amount of heat produced

d.

Question does not provide sufficient data or is vague

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Question 2

Question MCQ▾

Costly electric appliances are fitted with a:

Choices

Choice (4)Response

a.

Fuse wire in insulating holders

b.

Cartridge fuse

c.

None of the above

d.

Question does not provide sufficient data or is vague

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Question 3

Question MCQ▾

Fuse is:

Choices

Choice (4)Response

a.

Fusible wire of short length

b.

Made up of an alloy of lead and tin

c.

Inserted in each gadgets

d.

All a., b. and c. are correct

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Question 4

Question MCQ▾

MCB is better than fuse because:

Choices

Choice (4)Response

a.

It exceeds the specified maximum limit

b.

It does not have to be replaced

c.

It automatically stops the current

d.

All a., b. and c. are correct

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Question 5

Question MCQ▾

Heating devices contain wire in the form of a coil is called as:

Choices

Choice (4)Response

a.

Key

b.

Ammeter

c.

Switch

d.

Element

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Question 6

Question MCQ▾

Wattage is defined as:

Choices

Choice (4)Response

a.

Amount of current sufficient to run the appliance

b.

A coil of wire

c.

Unit of electricity

d.

All of the above

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