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Electric Circuits

Electric Circuits
In the above question find the angle between voltage and current?

 60.
 30.
 54.74.
 90.

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Electric Circuits
Which of the following are the passive elements?

 Resistor
 None of these.
 Both
 Bulb

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Electric Circuits
If the dielectric of a capacitor is replaced by conducting material

 the plate will get short circuited.
 the capacitor will get heated up due to eddy currents.
 the capacitor can store infinite charge.
 the capacitance value of the plate will decrease.

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Electric Circuits
In balanced bridge, if the positions of detector and source are interchanged, the bridge will still remain balanced. This can be explained from which theoem

 Reciprocity theorem
 Thevinin's theorem
 Compensation theorem
 Norton's theorem

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

 s.
 1/s2.
 s2.
 1/s.

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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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