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Electric Circuits

Electric Circuits
Which of the following has least resistivity?

 Copper.
 Aluminium.
 Mercury.
 Lead.

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

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

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Electric Circuits
Kirchhoff’s current law is used for

 representing a current source.
 loop analysis.
 finding equivalent resistance.
 nodal analysis.

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Electric Circuits
An electrical circuit with 10 branches and 7 nodes will have

 7 loop equations.
  10 loop equations.
 3 loop equations.
  4 loop equations.

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Electric Circuits
In RL series circuit R=2Ω and L=10mH and applied voltage is 10V DC. Then find the current in the network?

 10A
 1A
 0A
 5A

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Electric Circuits
Total instantaneous power supplied by a 3 - φ AC supply to a balanced RL load is

 zero.
 constant.
 pulsating with non zero average.
 pulsating with zero average.

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