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Electric Circuits

Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The current in R is

 5.08 A.
 2.54 A.
 1.27 A.
 10.16 A.

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Electric Circuits
A 3Ω resistor having 2A current will dissipate the power of

 4 W.
 8 W.
 12 W.
 2 W.

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Electric Circuits
A voltage source having an open circuit voltage of 100 V and internal resistance of 50 Ω is equivalent to a current source

 none of these.
 0.5 A in parallel with 50 Ω.
 2 A with 50 Ω in series.
 2 A with 50 Ω in parallel.

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Electric Circuits
A star connected load has three equal impedance each of (40 + j30) Ω If the line current is 5 A then value of line voltage is

 250 V.
 200 V.
 250 / √3 V.
 250 √3 V.

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Electric Circuits
If all the elements in a particular network are linear, then the superposition theorem would hold, when the excitation is

 DC only
 AC only
 An Impulse
 Either AC or DC

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Electric Circuits
A 10 Ohm resistor has power rating of 1W. Find the maximum current rating.

 1 A.
 0.1 A.
 0.316 A.
 0.01 A.

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