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Electric Circuits

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

 1/s.
 1/s2.
 s2.
 s.

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Electric Circuits
A 6 V lead acid battery has an internal resistance of 0.01 Ω. How much current will flow when the battery is short circuited?

 1 A.
 6 A.
 600 A.
 100 A.

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Electric Circuits
A capacitor is charged by a constant 10 mA current sources which is turned on for 1 second. Assuming the capacitor is initially charge free; determine the charge delivered to and the power supplied by the source if the capacitor has a value of 1 mF.

 0.1C, 10MW.
 0.01C, 10MW.
 0.01C and 5W.
 0.1C, 100MW.

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Electric Circuits
During charging, the electrolyte of a lead acid battery becomes

 stronger.
 there is no change in electrolyte.
 diluted with water.
 weaker.

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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

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

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Electric Circuits
The delta equation of given star connected impedance ZQR is equal to

 (5 + j10 / 3) Ω.
 (20 + j10) Ω.
  (10 + j30) Ω.
 40 Ω.

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