Physics
Circuit breaker usually operate under

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

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Physics
A drop of liquid assumes spherical shape because:

A sphere has the least surface area for a given volume
Intermolecular forces are strong in liquids
A sphere has the largest surface area for a given volume
Inter molecular forces are weak in liquids

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