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Electric Circuits

Electric Circuits
Condition of symmetry in ABCD parameter representation is

 C = D.
 AD - BC = 1.
 A = D.
 B = D.

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Electric Circuits
In the circuit shown in the figure, the value of Vs is 0, when I = 4 A. The value of I, when Vs = 16 V, is

 6 A.
 10 A.
 12 A.
 8 A.

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Electric Circuits
For the network shown below when I = 0, V = 20 V and when R = 0, I = 10 A. If now R = 3 Ω what is the value of the current I?

 5 A.
 4 A.
 6 A.
 10 A.

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Electric Circuits
Which of the following has no units?

 Permittivity
 Magnetic susceptibility
 Permeability
 Moment of a magnet

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Electric Circuits
A branch of a network is said to be active when it consists of one

 inductor.
 capacitor.
 resistor.
 voltage source.

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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

 N.
 b - N + 1.
 N - 1.
 b - N - 1.

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