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Physics

Physics
Who defined the law of gravitation ?

Galileo
Archimedes
Faraday
Newton

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Physics
The bending of light when it passes around a corner or a slit is due to ________

Reflection
Refraction
Diffraction
Total internal reflection

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Physics
If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is

12 cm
1 cm
6 cm
24 cm

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Physics
Total internal reflection can not take place when light goes from :

Glass to water
Water to air
Glass to air
Water to glass

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Physics
A metal-semiconductor junction diode is called ________

P-N Juction diode
Tunnel diode
Photo diode
Schottky diode

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Physics
Outside of cooking utensils are generally left black from below because

It is difficult to clean daily.
Black surface is a poor conductor of heat.
Black surface is a good absorber of heat.
Black surface is a good conductor of heat.

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