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Electric Circuits

Electric Circuits
Consider the following circuit : Switch is closed at t = 0 Find i(0 +)

 V/R.
 0.
 V / {R + (sL + 1 / Cs)}.
 (V*L) / (R*C)

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Electric Circuits
If the length of a wire of resistance R is uniformly stretched to n times its original value, what will be its new resistance

  n2 / R.
  n2R.
  nR .
  R / n2.

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Electric Circuits
Which of following materials has the least resistivity ?

  Copper.
  Lead.
  Mercury.
  Zinc.

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Electric Circuits
Which quantity should be measured by the voltmeter ?

 Power
 Current
 Speed
 Voltage

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

 1/s2.
 1/s.
 s.
 s2.

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Electric Circuits
Two resistors R1 and R2 give combined resistance of 4.5 Ohm when connected in series and 1 Ohm when in parallel, the resistances are

 2.2 Ohm and 2.3 Ohm.
 1.5 Ohm and 3 Ohm.
 1.25 Ohm and 3.25 Ohm.
 2 Ohm and 2.5 Ohm.

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