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Electric Circuits

Electric Circuits
In ideal system coefficient of coupling(k) is

 0
 ∞
 1
 Both 2 and 3

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Electric Circuits
Find the Z parameters of the circuit shown in figure.

 Z11 = 1; Z12 = 1; Z21 = 1; Z22 = 1
 Z11 = 3; Z12 = 3; Z21 = 3; Z22 = 3
 Z11 = 3; Z12 = 1; Z21 = 1; Z22 = 3
 Z11 = 2; Z12 = 1; Z21 = 1; Z22 = 2

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Electric Circuits
Time constant of RC series circuit is

 RC
 2L/R
 L/R
 2RC

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Electric Circuits
Three identical inductors are connected in delta with a 220 V, 50 Hz, 3 - φ, supply. If the phase current is 24 A, then what is the value of each of the inductance?

 0.058 H.
 0.049 H.
 None of these.
 0.029.

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Electric Circuits
Coating generally recommended for hard surfacing is

 copper plating.
 chromium plating.
None of these
 lead plating.

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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.

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

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