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Electric Circuits

Electric Circuits
A 100 ohm resistor is directly connected across a 80 V battery. What is the power dissipation?

 1 W.
 10 W.
 5 W.
  64 W.

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Electric Circuits
A capacitor is connected to supply with switch and the switch is connected between capacitor and supply. Initially switch is open at time zero, and then switch is closed. Then how capacitor behaves at time t = 0+?

 short circuit.
 open circuit.
 dielectric losses decreases.
 dielectric losses increases.

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Electric Circuits
Which of following capacitors preferred for high frequency circuits?

 Air capacitor.
 Electrolytic capacitor.
 Mica capacitor.
 Glass capacitor.

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Electric Circuits
Which of the following has least resistivity?

 Copper.
 Mercury.
 Lead.
 Aluminium.

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Electric Circuits
The average value of half wave rectified sinusoidal current waveform, whose maximum value is 1A is

 0.637 A.
 0.5 A.
 0.318 A.
 1 A.

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Electric Circuits
If N is the number of nodes and b is the number of branches in a network, then rank of cut set matrix is

 N.
 b - N - 1.
 b - N + 1.
 N - 1.

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