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Electric Circuits

Electric Circuits
The laplace transform of the fuction f(t) = t is

 1/s2.
 s2.
 1/s.
 s.

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Electric Circuits
The rms value of the resultant current in a wire which carries a DC current of 10A and a sinusoidal current of peak value 20A is

 17.3A .
 22.4A.
 30A.
 14.14A.

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Electric Circuits
In the given figure, the Thevenins equivalent voltage and impedance as seen from the terminals P - Q is given by

 4 V and 7.5 Ω.
 4 V and 5 Ω.
 2 V and 7.5 Ω.
 2 V and 5 Ω.

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Electric Circuits
Two resistances R1 and R2 give combined resistances 4.5 Ω and 1 Ω when they are connected in series and parallel respectively. What would be the values of these resistances?

 6 Ω and 9 Ω.
 3 Ω and 9 Ω.
  1.5 Ω and 3 Ω.
  3 Ω and 6 Ω.

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Electric Circuits
If emf in a given circuit is given by e = 100 sinω0t, then maximum value of voltage and frequency will be

 100√2 V, 100 Hz.
 100 V, 50 Hz.
 100 V, 100 Hz.
 50√2 V, 100 Hz.

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Electric Circuits
The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

  0.5.
 4.
  2.
 0.25.

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MORE MCQ ON Electric Circuits

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