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Electric Circuits

Electric Circuits
2) Two sinusoidal emfs are given as e1 = Asin(wt+45) and e2 = Bsin(wt-30). The phase difference between the two quantities in degrees is

 60.
 105.
 75.
 15.

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Electric Circuits
Condition for reciprocity in case of ABCD parameters is

 AD-BC = 0.
 AD-BC = 1 .
  AB-CD = 0.
 AB-CD = 1.

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Electric Circuits
Which of the followings is the expression for energy stored in a capacitor?

 C dv / dt.
 (1 / 2) Cv2.
 C / v.
 Cv.

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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
Which of the following lamp has least resistance ?

  25 W, 220 V.
  200 W, 220 V.
  60 W, 220 V.
 100 W, 220 V.

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Electric Circuits
The value of supply voltage for 400 W, 4 Ω load is

 40 V.
 400 V.
 200 V.
 20 V.

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