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Physics

Physics
In the absence of ozone layer, which rays will enter into atmosphere?

Ultraviolet
Visible
Infrared
X-rays

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Physics
The working of the quartz crystal in the watch is based on the

Photoelectric Effect
Edison Effect
Piezo - electric Effect
Johnson Effect

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Physics
A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of

36 m/s
25 m/s
30 m/s
18 m/s

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Physics
Who among the following discovered X-rays?

W.C Roentgen
James Chadwick
J.J Thomson
Marie Curie

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Physics
Magnetic keepers are pieces of

Nickel
Steel
Soft iron
Cobalt

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Physics
Which one of the following is responsible for the working of Newton's colour disc experiment ?

Principle of complementary colour
Formation of impure spectra
Persistence of vision
Formation of pure spectra

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MORE MCQ ON Physics

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