Questions & Answers of Wye-Delta Transformation

Question No. 118

The figure shows an RLC circuit with a sinusoidal current source.

At resonance, the ratio IL/IR, i.e., the ratio of the magnitudes of the inductor current phasor and the resistor current phasor, is ________

Question No. 219

In the RLC circuit shown in the figure, the input voltage is given by

               vi(t) = 2 cos(200t) + 4sin(500t)

The output voltage v0(t) is


Question No. 16

In the circuit shown, at resonance, the amplitude of the sinusoidal voltage (in Volts) across the capacitor is ______ .

Question No. 40

The damping ratio of a series RLC circuit can be expressed as

Question No. 116

The voltage (VC) across the capacitor (in Volts) in the network shown is _______

Question No. 117

In the circuit shown, the average value of the voltage Vab (in Volts) in steady state condition is _______.

Question No. 140

An LC tank circuit consists of an ideal capacitor C connected in parallel with a coil of inductance L having an internal resistance R. The resonant frequency of the tank circuit is

Question No. 218

At very high frequencies, the peak output voltage Vo (in Volts) is_____.

Question No. 240

In the circuit shown, the current I flowing through the 50 Ω resistor will be zero if the value of capacitor C (in μF) is _______.

Question No. 23

A source v s (t) = V c o s 100 π t has an internal impedance of (4+j3)Ω . If a purely resistive load connected to this source has to extract the maximum power out of the source, its value in Ω  should be

Question No. 28

In the circuit shown below, if the source voltage VS = 10053.13° V then the Thevenin’s equivalent voltage in Volts as seen by the load resistance RL is

Question No. 32

Two magnetically uncoupled inductive coils have Q factors q1 and q2 at the chosen operating frequency. Their respective resistances are R1 and R2. When connected in series, their effective Q factor at the same operating frequency is