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Electric Circuits

Electric Circuits
Poorest conductor of electricity is

  Silver.
  Aluminium.
  Carbon.
  Steel.

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Electric Circuits
Which metal is deposited for electro forming?

  Silver.
  Nickel.
  Chromium.
  Iron.

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Electric Circuits
In a lead acid cell PbSO4 formed during

  both during charging as well as discharging.
  charging only.
  neither during charging nor discharging.
  discharging only.

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Electric Circuits
In RLC parallel network R = 2 Ohm, L = 2mH and C = 1μF. Find the value of time constant?

 4 msec
 4 μsec
 2 μsec
 2 msec

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Electric Circuits
An electrical motor has rating of 10 MVA at 0.8 lag, represented as series RL circuit at a 50 MVA base. Find the impedance value?

 (4 + j3) pu
 (3 + j4) pu
 (2 + j4) pu
 (4 + j2 ) pu

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Electric Circuits
The thevnin equivalent of the circuit shown in the figure is

 1.5V, 5/6 Ohm
 0.75V, 5/6 Ohm
 1.5V, 1.5 Ohm
 0.75 V, 1.5 Ohm

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