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Electric Circuits

Electric Circuits
A 10Ω resistor is stretched to increase its length double. Its resistance will now be

 5 Ω.
 20 Ω.
 40 Ω.
 10 Ω.

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Electric Circuits
Active element of electrical circuit is

 both of them.
 voltage source.
 current source.
 none of above.

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Electric Circuits
Three 3Ω resistors are connected to form a triangle. What is the resistance between any two of the corner?

 3 Ω.
  2 Ω.
 6 Ω.
 9 Ω.

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Electric Circuits
VRN, VYN and VBN are three phase voltage of a balanced three phase system. If VRN = 200∠30o V and VBN = 200∠- 90o V, then phase sequence of the system is

 YRB.
 BRY.
 RBY.
 RYB.

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Electric Circuits
Highest current density is usually recommended for

  chromium plating.
  tin plating.
  cadmium plating.
  bronze plating.

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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.
 32.1o.
 20.2o.
 28.8o.

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MORE MCQ ON Electric Circuits

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