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

Refraction
Reflection
Diffraction
Total internal reflection

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Physics
Circuit breaker usually operate under

Steady state of short-circuit current
After D. C. component has ceased
Sub-transient state of short-circuit current
Transient state of short-circuit current

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Physics
Thermohaline circulation is mainly due to

Warm water being added to the ocean due to industial waste
Cold, dense ocean water sinking and warmer water replacing it
Warmer, less dense water sinking in the ocean and cold water replacing it
Winds causing circulation of ocean water

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Physics
A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because

The human body maintains a constant temperature
The carpet is a better conductor of heat than the stone
The floor and carpet are at different temperatures
The stone conveys the heat away from the feet more rapidly than the carpet

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