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Electric Circuits

Electric Circuits
A motor having a power factor of 0.8 absorbs in active power of 1200 W the reactive power drawn from the supply is _________ VA.

 900
 250
 400
 130

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Electric Circuits
The ratio of electric flux density to electric field intensity is called ......... of medium

 permeability
 permittivity
 capacitance
 reluctance

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Electric Circuits
The resistance of 200 W, 200 V lamp is

 800 Ω.
 100 Ω.
  200 Ω.
 400 Ω.

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Electric Circuits
Cascade connection of two port networks is analyzed through

 h parameters.
 Z parameters.
 Y parameters.
 ABCD parameters.

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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?

 YBR.
 RYB.
 RBY.
 BYR.

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Electric Circuits
Three resistors each R Ohm is connected to form a triangle. The equivalent resistance across any terminals is

 2R/3.
 3R/2.
 R.
 R/2.

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