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Electric Circuits

Electric Circuits
Magnetic flux has the unit of

 Newton
  Tesla
 Ampere turn
 Weber

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Electric Circuits
Which of the following has no units?

 Permittivity
 Permeability
 Magnetic susceptibility
 Moment of a magnet

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Electric Circuits
Twelve 6 Ω resistor used as edge to form a cube. The resistance between two diagonally opposite corner of the cube is

 6 / 5 Ω.
 6 Ω.
 5 Ω.
 5 / 6 Ω.

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Electric Circuits
The active and reactive power in an AC circuit are 10W and 20VAR respectively. What is the power factor?

 0.866.
 0.5.
 0.577.
 1.

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Electric Circuits
The resistance of a strip of copper of rectangular cross section is 2 Ω. A metal of resistivity twice that of a copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be

 3 / 2 Ω.
 4 / 3 Ω.
 3 / 4 Ω.
 6 Ω.

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Electric Circuits
A current of 1 mA flows through a 1M ohm, 2 W carbon resistor. The power dissipated as heat in the resistor will be

 1 W.
 0.5 W.
None of these
 2 W.

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MORE MCQ ON Electric Circuits

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