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Electric Circuits

Electric Circuits
If P is the power of a star connected system then what will be power of an equivalent delta connected system?

None of these
 P
 P/3
 3P

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Electric Circuits
Three parallel resistive branches are connected across a DC supply. The ratio of the branch resistances are given as R1:R2:R3 :: 2:4:6. The ratio of the branch currents is

 6:4:2.
 2:4:6.
 2:3:6.
 6:3:2.

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

 voltage source.
 capacitor.
 inductor.
 resistor.

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Electric Circuits
Which of the following has no units?

 Permeability
 Magnetic susceptibility
 Permittivity
 Moment of a magnet

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Electric Circuits
In a 3 - φ delta connection, two-wattmeter method is used to measure the power; if the two watt meters read 28.13 kW and 13.31 kW, the power factor of connection will be

 0.9.
 0.85.
 0.4.
 0.6.

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Electric Circuits
Which of following capacitors preferred for high frequency circuits?

 Air capacitor.
 Glass capacitor.
 Electrolytic capacitor.
 Mica capacitor.

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