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Electric Circuits

Electric Circuits
Which of the following has no units?

 Moment of a magnet
 Magnetic susceptibility
 Permeability
 Permittivity

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Electric Circuits
If the practical units of voltage and current wave each made 20 times as large as they are at present, what would be the consequent alternation in the size of the unit of capacitance?

 Nil.
 60 times.
 20 times.
 200 times.

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Electric Circuits
Phase voltages of a star connected alternator are ER = 240∠0o V, EY = 240∠-120o V and EB = 240∠ + 120o V. What is the phase sequence of the system?

 RYB.
 BYR.
 YBR.
 RBY.

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Electric Circuits
In the circuit given, I = 1 A for Is = 0. What is the value of I for Is = 2 A ?

 1 A.
 3 A.
  2 A.
 4 A.

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Electric Circuits
If two point charges are denoted by + Q and - Q and distance between this charges is d, then the dipole moment P equal to

  Q2 / d.
  Q2 × d.
  Q / d2.
  Q × d.

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Electric Circuits
A branch of a network is said to be active when it consists of one

 inductor.
 capacitor.
 voltage source.
 resistor.

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MORE MCQ ON Electric Circuits

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