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Electric Circuits

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

 b - N + 1.
 N - 1.
 b - N - 1.
 N.

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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 average value in Amperes.

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

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Electric Circuits
What is the unit of potential difference ?

 Watt
 Ampere
 Volt
 Ohm

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Electric Circuits
Silver coating is provided for

  decorative purpose.
  bearing surfaces.
  protective purpose.
  all of above.

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Electric Circuits
In a 3 - φ delta connection, two-wattmeter method is used to measure the power; if the two watt meters read 28.13 kW and 13.31 kW, the power factor of connection will be

 0.4.
 0.6.
 0.85.
 0.9.

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Electric Circuits
The value of supply voltage for 400 W, 4 Ω load is

 40 V.
 400 V.
 200 V.
 20 V.

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