Physics
________ states that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done by the system.

Hooke's Law
The coulomb's law
First law of thermodynamics
Faraday's Law

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Physics
Circuit breaker usually operate under

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

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Physics
Planets do not twinkle because

They are very far away from the earth resulting in decrease in intensity of light
Their distance from the earth does not change with time
They are nearer to earth and hence we receive a greater amount of light.
They emit light of a constant intensity

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