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Electric Circuits

Electric Circuits
The value of unity impulse function at time (t) = 0 is

 indeterminate.
 infinite.
 1.
 0.

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Electric Circuits
A 20 μF capacitor and 200 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow dimmest?

 100 Hz.
 1 Hz.
 10 Hz.
 1000 Hz.

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Electric Circuits
A current of 1 mA flows through a 1M ohm, 2 W carbon resistor. The power dissipated as heat in the resistor will be

 0.5 W.
 2 W.
 1 W.
None of these

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Electric Circuits
Voltage magnification will occur in which of the following case?

 Parallel resonance
 Series resonance
None of these
 Both

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Electric Circuits
Can a 250 V, 5 A single way switch be used in place of a 250 V, 15 A Switch?

  Yes.
  No.
  Single way switch doesn exist.
  Single way switch doesn operate at such current ratings.

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Electric Circuits
A load is connected to an active network. At the terminals to which the load is connected, RTH = 10 Ohm, VTH = 60V. Then maximum power supplied to the load is

 90W.
 360W.
 180W.
 60W.

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