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Electric Circuits

Electric Circuits
Which cell has the reversible chemical reaction?

 Carbon Zinc.
 Silver oxide.
 Mercury oxide.
 Lead acid.

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Electric Circuits
The maximum value of a current wave is 2A. If the form factor of a current wave is 1.5 and the peak factor is 2.7, find the rms value in Amperes.

 0.741 A.
 0.494 A.
 1.414 A.
 1.57 A.

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Electric Circuits
Which of the following materials has highest electrical conductivity ?

  Steel.
  Aluminium.
  Copper.
  Silver.

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Electric Circuits
If N is the number of nodes and b is the number of branches in a network, then rank of tie set matrix is

 b - N - 1.
 N.
 b - N + 1.
 N - 1.

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Electric Circuits
In RLC parallel circuit if current through capacitor and inductor is equal. Then What is the power factor?

 zero
 leading
 unity
 lagging

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Electric Circuits
Two wires of A and B of the same material and length ‘l’ and ‘2l’ have radius ‘r’ and ‘2r’ respectively. The ratio of their specific resistance will be

 1:2.
 1:8.
 4:1.
 1:1.

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