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The relay operating coil is supplied through

current transformer
None of these
power transformer
fuse

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To protect most of the electrical equipment handling low power, the types of relays used are

None of these
Thermocouple
Electronic and bimetallic
Both of the listed here

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Arc in a circuit breaker is interrupted at

maximum voltage
minimum voltage
zero current
maximum current

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The making capacity of a circuit breaker is equal to

√3 × symmetrical breaking capacity
√2 × symmetrical breaking capacity
2.55 × symmetrical breaking capacity
None of these

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Admittance relay is

directional relay
impedance relay
None of these
non-directional relay

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The current rating of a fuse is 5A. The fusing current will be

2.5 A
more than 5A
1 A
5 A

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