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21
In a moving coil instrument, the deflecting torque is proportional to
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Answer: Option A
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22
In a moving iron meter, the deflecting torque is proportional to
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Answer: Option B
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23
Which wave has the least form factor?
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Answer: Option A
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24
The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures
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Answer: Option C
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25
Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are
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Answer: Option A
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26
The two pressure coils of a single phase power factor meter have
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Answer: Option A
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27
To measure the flux, devices used are based on
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Answer: Option C
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28
No eddy current and hysteresis losses occur in
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Answer: Option A
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29
The absolute measurement of resistance is done by
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Answer: Option D
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30
For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging
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Answer: Option C
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