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Electric Circuits

Electric Circuits
Consider the following circuit : Switch is closed at t = 0 Find i(0 +)

 (V*L) / (R*C)
 V/R.
 V / {R + (sL + 1 / Cs)}.
 0.

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Electric Circuits
A balanced delta connected load has an impedance of 9∠30o Ω per phase. What is the impedance per phase of its equivalent star?

 3∠30o Ω.
 27∠30o Ω
None of these
 30∠30o Ω.

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Electric Circuits
The phase angle difference between current and voltage is 90o, the power will be

 VI.
 zero.
 minimum.
 maximum.

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Electric Circuits
In a series resonance circuit if bandwidth is 1 MHz and inductance is 1 mH, then what is the resistance value?

 1 MΩ
 1 Ω
 100 Ω
 1 KΩ

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Electric Circuits
The rms value of sine wave is 100 A. Its peak value is

 141.4 A.
 282.8 A.
 150 A.
 70.7 A.

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Electric Circuits
Constant K type HPF (high pass filter) having cut off frequency 12 KHz and nominal impedance Ro = 500 Ω Find shunt arm inductor L and series arm capacitance C for T and π section of HPF ?

 L = 0.0132 mH, C = 0.0132 μF.
 L = 3.316 mH, C = 0.0132 μF.
 L = 3.316 mH, C = 132 μF.
 None of these.

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