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Electric Circuits

Electric Circuits
Which of following is the unit of magnetic flux density?

 Daraf.
 Lumens.
 Tesla.
 Weber.

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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.
 1.11.
 0.57.
 0.318.

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Electric Circuits
Nodal analysis can be applied for

 non planar networks.
 planar networks.
 both planar and non planar networks.
 neither planar and non planar networks.

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Electric Circuits
In the network shown, what is the current I in the direction shown?

 0 A.
 5 / 6 A.
 4 A.
 1 / 3 A.

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Electric Circuits
Number of branches of a graph should be --------- number of branches of a network

 greater than
 less than
 equals to
 less than equals to

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Electric Circuits
The capacitive reactance of an electric circuit is 50 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?

 100 Ohms.
 200 Ohms.
 25 Ohms.
 50 Ohms.

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