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Electric Circuits

Electric Circuits
In a series R, L circuit, voltage across resistor and inductor are 3 V and 4 V respectively, then what is the applied voltage?

 4V
 5V
 7V
 3V

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Electric Circuits
Which of the following may be the value of resistivity of copper at absolute zero in ohm-metre?

 1.56.
 6.24.
 3.12.
 0.020.

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Electric Circuits
For balanced star load, if unbalanced line current are IR, IY, IB equal to - j10, - j10 and - j20 respectively, the neutral current will be equal to

  (-9.66 + j5) A.
  (8.66 + j5) A.
  (8.66 - j5) A.
  (-8.66 - j5) A.

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Electric Circuits
In which of the following oscillations are not present?

 Critical damping
 Over damping
 Under damping
 Both 2 and 3

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Electric Circuits
Which metal is deposited for electro forming?

  Iron.
  Chromium.
  Silver.
  Nickel.

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The phase angle of current in respect of supply voltage will be

 32.1o.
 40.4o.
 20.2o.
 28.8o.

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