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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 tie set matrix is

 N - 1.
 b - N + 1.
 N.
 b - N - 1.

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Electric Circuits
A 3Ω resistor having 2A current will dissipate the power of

 8 W.
 12 W.
 4 W.
 2 W.

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Electric Circuits
An alternating voltage = 140 sinθ is supplied to a device which offers a resistance of 20 Ω in forward direction of current in reverse direction. Calculate the form factor.

 1.414.
 0.57.
 1.11.
 0.318.

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Electric Circuits
Which property is used to oppose the flow of current ?

 Capacitance
 Poteintial difference
 Inductance
 Resistance

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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.
 0.741 A.
 1.57 A.

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Electric Circuits
In RL series circuit R=2Ω and L=2mH. What is the value of time constant?

 4msec
 2msec
 100sec
 1msec

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