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Physics

Physics
Sound becomes hazardous noise pollution at decibels?

Above 120 db
Above 80 db
Above 50 db
Above 30 db

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Physics
A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance

Varies with the increase of depth of the immersion of the iron piece
Will increase
Will decrease
Does not change

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Physics
The metal used to make lightning conductors is

Aluminium
Zinc
Copper
Iron

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Physics
Why does'nt the hydrogen atom emit X-rays?

Its energy levels are very close to each other
It is very small in size
It has only one electron
It is highly electropositive

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Physics
Shaving mirror is

Concave
Parabolic
Plane
Convex

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Physics
One can distinguish a telescope from a microscope by observing

Length
Size of the lens
Length and size of the lens
Colour

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MORE MCQ ON Physics

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