Physics
Which of the following are methods of heat transfer?

Thermal Expansion
Revolution
Evaporation
Convection

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Physics
Circuit breaker usually operate under

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

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Physics
The Hooke's law is valid for

Only proportional region of the stress strain curve
Elastic as well as plastic region of the stress strain curve
Entire stress strain curve
Entire elastic region of the stress strain curve

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