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A short-circuit is identified by

voltage drop
voltage rise
no current flow
heavy current flow

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The power loss is an important factor for the design of

generator
transmission line
motor
feeder

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Back up protection is generally used for protection against

both open and short-circuit faults
open-circuit faults only
None of these
short-circuit faults only

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protection of fuses is generally not used beyond

20 A
50 A
100 A
200 A

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If the length of the arc in a circuit breaker increases, its resistance

decreases
remains same
None of these
increases

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The rate of rise of restriking voltage depends on

both inductance and capacitance of the system
the inductance of the system only
the capacitance of the system only
the type of circuit breaker

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