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Electric Circuits

Electric Circuits
The strength of current in 1 H inductor changes at rate of 1 A / sec. Find the voltage across it?

 2 V.
 0.5 V.
 None of these.
 1 V.

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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+?

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

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Electric Circuits
The equation for 25 cycles current sine wave having rms value of 30 amps, will be

 30sin50πt.
 42.4sin50πt.
 30sin25πt.
 42.4sin25πt.

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Electric Circuits
The energy required to charge a 10 μF capacitor to 100 V is

 0.01 J.
 10 × 10-9 J.
 5 × 10-9 J.
 0.05 J.

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Electric Circuits
R1 = 36 Ω and R2 = 75 Ω, each having tolerance of ±5% are connected in series. The value of resultant resistance is

 111 ± 2.77 Ω.
 111 ± 7.23 Ω.
  111 ± 0 Ω.
  111 ± 5.55 Ω.

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Electric Circuits
In RC series circuit R = 2Ω, C = 2μF and 10V dc is applied. Then what is the value of current?

 0A
 10A
 5A
 2A

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