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Electric Circuits

Electric Circuits
In series R, L circuit power factor can be defined as

 R/Z
All of these
 Vr/V
 P/S

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Electric Circuits
An electric field can deflect

 alpha particles.
 gamma-rays.
 neutrons.
 x-rays.

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Electric Circuits
Absolute permittivity of dielectric medium is represented as

 εr
 εr/ε0
 εrε0
 ε0

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Electric Circuits
A delta connection contains three equal impedance of 60 Ω. The impedance of the equivalent star connection for each star load will be

 20 Ω.
 40 Ω.
 30 Ω.
 15 Ω.

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Electric Circuits
A capacitor of 50 microfarad is connected in series with a resistance of 120 Ω. If above circuit is connected across 240 V, 50 Hz 1 - φ supply. Find the capacitive reactance?

 1.765 Ω.
 135.86 Ω.
 63.7 Ω.
 0.015 Ω.

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Electric Circuits
In direct arc furnace which of following is of high value?

 Current.
 All of above.
 Voltage.
 Power factor.

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MORE MCQ ON Electric Circuits

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