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Physics

Physics
A car accelerates uniformly from 18 kmph to 72 kmph in 5 s. The acceleration of the car (in m/s2) is:

7
6
5
3

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Physics
One bar is equal to

106 Pa
104 Pa
103 Pa
105 Pa

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Physics
What are the particles emitted by radioactive element after 3 consecutive disintegration?

2 beta 2 alpha
2 alpha 1 beta
2 beta 1 alpha
1 alpha 1 beta

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Physics
What is the reason for twinkling of stars ?

Dispersion of light
Atmospheric refraction
Atmospheric reflection
Total internal reflection

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Physics
When a body falls from an aeroplane, there is increase in its

Kinetic energy
Acceleration
Mass
Potential energy

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Physics
Ohm's law is valid in case of

Superconductor
Conductor
Semiconductor
Insulator

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