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PHYSICS

Physics
Which of these is not a simple machine?

A pair of scissors
The pulley
A ramp
A lever

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Physics
The plastic material commonly used for making gear wheels is

Polyesters
Bakelit
Nylons
Polystyrene

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Physics
The reason for a swimming pool to appear less deep than the actual depth is

Interference
Reflection
Light scattering
Refraction

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Physics
When light passes from one medium to another, this phenomenon of change in its direction is called ________

No option is correct
Propagation
Refraction
Diffraction

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Physics
Optical fibre works on which of the following principle of light?

Reflection
Refraction
Total internal reflection
Diffraction

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