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Physics

Physics
Which colour is the complementary colour of yellow ?

Blue
Green
Red
Orange

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Physics
Which of the following is not reversible?

Joule effect
Thomson effect
Seebeck effect
Peltier effect

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Physics
A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an

Audible wave
Ultrasonic wave
Infrasonic wave
Microwave

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Physics
The radiant energy having lowest energy is

Visible light
Gamma rays
UV rays
Microwave radiation

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

6
5
3
7

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Physics
Water cannot be used to extinguish fire caused by electric current, because

It may cause electrolysis
It may cause hydrolysis
It may spoil the wiring
It may cause electrocution

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