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Physics

Physics
Which of the following is a good conductor of heat but a bad conductor of electricity ?

Asbestos
Celluloid
Rubber
Mica

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Physics
The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as

Audible sounds
Megasonics
Infrasonics
Ultrasonics

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Physics
In which one of the following the phenomenon of total internal reflection of light is used ?

Formation of mirage
Working of binoculars
Formation of rainbow
Twinkling of stars

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Physics
Light year is a unit of

Distance
Light
Intensity of light
Time

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Physics
Which waves cannot be transmitted through vacuum?

Electromagnetic
Light
Heat
Sound

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Physics
When a ring of metal is heated what happens to its hole ?

It expands or contracts according to its diameter
It expands or contracts according to its coefficient of expansion
Expands
Contracts

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MORE MCQ ON Physics

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