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Electric Circuits

Electric Circuits
Resistor stores the energy in the form of

 electrical field.
 magnetic field.
 both A and B.
None of these

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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

 2:4:6.
 2:3:6.
 6:4:2.
 6:3:2.

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Electric Circuits
Three identical resistor are connected in star across a 3 phase 550 V supply dissipating a total power of 300 W the line current is ____________ A.

 0.5
 2.56
 3.149
 1

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Electric Circuits
Types of rotating machines

 IM.
 synchronous machine.
 transformer.
 both B and C.

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Electric Circuits
A wire of resistance R has it length and cross - section both doubled. Its resistance will become

 0.5R.
 2R.
 R.
 4R.

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Electric Circuits
What is Va in the below circuit?

 (3R + 10) / 3.
 (6R + 10) / 3.
 (6R - 10) / 3.
 (4R + 10) / 3.

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