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We have listed important basic Physics questions and answers. These physics gk questions are frequently asked in many competative exams, you should go through it.
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Q 31.
Solar Cells work on the principle of ?
Ans.
Photovoltaic Effect
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Q 32.
If thr radius of the earth is reduced by 1%, what will be the effect of g ?
Ans.
Will decrease
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Q 33.
Plank's constant has the dimansion ?
Ans.
Energy
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Q 34.
A star appears twinkling in the sky because of ?
Ans.
Refraction of light by the atmosphere
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Q 35.
If the velocity of the projectile is doubled, its maximum range will be
?
Ans.
Four times
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Q 36.
Centigrade and Fahrenheit temperatures are same at ?
Ans.
-40 degree
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Q 37.
Which electromagnectic radiation is used for satellite communication ?
Ans.
Microwave
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Q 38.
The rate of change in displacement over time is called ?
Ans.
Velocity
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Q 39.
The dimension is same as that of impulse ?
Ans.
Momentum
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Q 40.
What is the minimum escape velocity of rocket too be launched into space ?
Ans.
11.2 km.sec
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Q 41.
The dimension of which is the same as that of impulse ?
Ans.
Momentum
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Q 42.
Which is the fundamental quantity ?
Ans.
Time
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Q 43.
X-rays are called ?
Ans.
Electromagnetic waves
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Q 44.
The units of index of refraction are ?
Ans.
There is no unit of refraction
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Q 45.
A magnetic field exerts a force on a charged particle ?
Ans.
If the particle is moving across the field lines
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Q 46.
The zeroth law of thermodynamics allows us to define ?
Ans.
Thermal equilibrium
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Q 47.
An artificial satellite of Earth releases a bomb. Neglecting air resistance, the bomb will ?
Ans.
Never strike Earth
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Q 48.
The mass of a neutron ?
Ans.
Is a little more than that of a proton
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Q 49.
What type of eyeglasses should a nearsighted person wear ?
Ans.
Diverging lenses
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Q 50.
Faraday's law states that an induced emf is proportional to ?
Ans.
The rate of change of the magnetic flux
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Q 51.
For a given medium, the frequency of a wave is ?
Ans.
Inversely proportional to wavelength
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Q 52.
The total charge of a conductor spreads on its ?
Ans.
Outer surface
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Q 53.
What will be the effect of a moving lift on a person's mass ?
Ans.
It will remain constant
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Q 54.
Sound cannot travel through _______ ?
Ans.
Vaccum
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Q 55.
Conservation of linear momentum is equivalent to ?
Ans.
Newton's 3rd law of motion
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Q 56.
A man in a lift will weigh more when ?
Ans.
Lift accelerated upward
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Q 57.
Newton's second law gives a measure of ?
Ans.
Force
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Q 58.
Newton's first law of motion gives the concept of ?
Ans.
Inertia
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Q 59.
If the momentum of a body is increased by 50%, its K.E will increase by ?
Ans.
125%
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Q 60.
Why light coloured clothes are preferred in summer ?
Ans.
Because light colours are poor absorbs of heat
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