Electric Current and Its Effects-Heating Effect of Electric Current (CBSE Class-7 Science): Questions 1 - 6 of 6

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Question number: 1

» Electric Current and Its Effects » Heating Effect of Electric Current » Electric Iron and Heater

MCQ▾

Question

Electric iron and heater works on the principle of:

Choices

Choice (4) Response
a.

Heating effect of the electric current

b.

Amount of heat produced

c.

Resistance offered by the wire

d. Question does not provide sufficient data or is vague

Question number: 2

» Electric Current and Its Effects » Heating Effect of Electric Current » Fuse

MCQ▾

Question

Costly electric appliances are fitted with a:

Choices

Choice (4) Response
a.

Cartridge fuse

b.

Fuse wire in insulating holders

c. None of the above
d. All of the above

Question number: 3

» Electric Current and Its Effects » Heating Effect of Electric Current » Fuse

MCQ▾

Question

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

Question number: 4

» Electric Current and Its Effects » Heating Effect of Electric Current » Miniature Circuit Breaker

MCQ▾

Question

MCB is better than fuse because:

Choices

Choice (4) Response
a.

It exceeds the specified maximum limit

b.

It automatically stops the current

c.

It does not have to be replaced

d. All a. , b. and c. are correct

Question number: 5

» Electric Current and Its Effects » Heating Effect of Electric Current » Electric Iron and Heater

MCQ▾

Question

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

Choices

Choice (4) Response
a.

Key

b.

Switch

c.

Element

d.

Ammeter

Question number: 6

» Electric Current and Its Effects » Heating Effect of Electric Current » Electric Iron and Heater

MCQ▾

Question

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. Question does not provide sufficient data or is vague

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