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Physics

Physics
The best material for the core of a transformer is

Soft iron
Mild steel
Hard steel
Stainless steel

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Physics
If an ordinary glass tube and a glass capillary tube are both dipped in a beaker of water, water rises in

Neither
Both
Only the capillary tube
Only the glass tube

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Physics
Optical Fibre technology works on which of these principles of Physics?

Photoelectric effect
Newton's law of Motion
Total internal reflection of Light
Bernoulli's Principle

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Physics
An athlete runs before long jump to get advantage on

Moment of a force
Frictional force
Principle of moments
Inertia of motion

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Physics
Oil rises up the wick in a lamp because

Of the capillary action phenomenon
Of the diffusion of oil through the wick
Oil is very light
Of the surface tension phenomenon

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Physics
Why does a cannon recoil after firing ?

Conservation of energy
Backward thrust of gases produced
Newton's third law of motion
Newton's first law of motion

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