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7th CBSE
IMPORTANT
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Circuit Breaker device which can be used in place of fuse in domestic electric wiring is called

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Important Questions on Electric Current and Its Effects

EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Multiple Choice Questions (MCQs)>Q 63

Nichrome wire is used in

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7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Multiple Choice Questions (MCQs)>Q 64
In a filament-type bulb, a lot of electric energy is wasted in the form of:
EASY
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Multiple Choice Questions (MCQs)>Q 65

The sound produced in a door bell is due to the:

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7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Multiple Choice Questions (MCQs)>Q 66
Which of the following characteristic is not suitable for a fuse wire?
MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Multiple Choice Questions (MCQs)>Q 67

An MCB which cuts off the electricity supply in domestic circuit in case of short-circuiting or overloading works on the:

MEDIUM
7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Multiple Choice Questions (MCQs)>Q 68
The magnetic effect of electric current was discovered by _____.
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7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Multiple Choice Questions (MCQs)>Q 69
Which of the following does not work on the heating effect of current?
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7th CBSE
IMPORTANT
AWARENESS SCIENCE for Seventh Class>Chapter 14 - Electric Current and Its Effects>Multiple Choice Questions (MCQs)>Q 70
The compact fluorescent electric lamp has: