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A fuse is never inserted in
negative of dc circuit
neutral wire
positive of dc circuit
phase line
negative of dc circuit
neutral wire
positive of dc circuit
phase line
Answer
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The arc voltage produced in AC circuit breaker is always
In phase with the arc current
lagging the arc current by 90°
leading the arc current by 90°
None of these
In phase with the arc current
lagging the arc current by 90°
leading the arc current by 90°
None of these
Answer
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A fuse is a
None of these
current limiting device
current controlling device
protective device
None of these
current limiting device
current controlling device
protective device
Answer
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The reflection co-efficient at the open circuited end of a transmission line
infinity
unity
None of these
zero
infinity
unity
None of these
zero
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Arc in a circuit breaker behaves as
a resistance decreasing with voltage rise across the arc
a capacitive reactance
an inductive reactance
a resistance increasing with voltage rise across the arc
a resistance decreasing with voltage rise across the arc
a capacitive reactance
an inductive reactance
a resistance increasing with voltage rise across the arc
Answer
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HRC fuses provide best protection against
short circuits
reverse current
open circuits
overload
short circuits
reverse current
open circuits
overload
Answer
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