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Electric Circuits

Electric Circuits
Which of the following substance when added to electrolyte promotes smooth deposition?

 Albumen.
 Glucose.
 Gelatine.
 Any of above.

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Electric Circuits
The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be

 2R Ω
 R Ω
 8R Ω
 4R Ω

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Electric Circuits
One atomic mass unit ( amu ) is approximately equal to

 1.6 × 10-13 Kg.
 1.6 × 10-19 Kg.
  1.6 × 10-27 Kg.
 1.6 × 10-24 Kg.

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Electric Circuits
Types of rotating machines

 both B and C.
 IM.
 synchronous machine.
 transformer.

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Electric Circuits
The maximum current rating for a 10 k Ω, 0.5 W resistor is

 28.28 mA.
 14.14 mA.
 0.707 mA.
 7.07 mA.

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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

 20.2o.
 40.4o.
 32.1o.
 28.8o.

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