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Electric Circuits

Electric Circuits
Energy efficiency during electroplating is usually in the range

 50 to 80%.
 80 to 85%.
 85 to 90%.
 90 to 99%.

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The phase angle of current in respect of supply voltage will be

 40.4o.
 28.8o.
 32.1o.
 20.2o.

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Electric Circuits
In balanced bridge, if the positions of detector and source are interchanged, the bridge will still remain balanced. This can be explained from which theoem

 Thevinin's theorem
 Norton's theorem
 Reciprocity theorem
 Compensation theorem

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Electric Circuits
To reduce hysteresis loss, we use

 copper bars.
 laminated sheets.
 soft-iron.
 CRGO steel.

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Electric Circuits
Which of the following carbon coded resistor has value of 10k ohm with 20% tolerance?

 Orange, orange, black and gold stripes.
 Yellow, violet, yellow and silver stripes.
 Brown, black, orange and no tolerance band.
 Red, red, green and silver stripes.

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Electric Circuits
When power factor angle is constant, then shape of the current locus is

 semi circle.
 straight line.
 triangle.
 circle.

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MORE MCQ ON Electric Circuits

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