# Questions & Answers of Wye-Delta Transformation

## Weightage of Wye-Delta Transformation

Total 12 Questions have been asked from Wye-Delta Transformation topic of Networks subject in previous GATE papers. Average marks 1.42.

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

At resonance, the ratio $\left|{\mathbf{I}}_{\mathbf{L}}\right|/\left|{\mathbf{I}}_{\mathbf{R}}\right|$, i.e., the ratio of the magnitudes of the inductor current phasor and the resistor current phasor, is ________

##### Show Answer

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

$v_i\left(t\right)=2\;\cos\left(200t\right)+4\;\sin\left(500t\right)$

The output voltage $v_0\left(t\right)$ is

##### Show Answer

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

##### Show Answer

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

##### Show Answer

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

##### Show Answer

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

##### Show Answer

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

##### Show Answer

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

##### Show Answer

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 _______.

##### Show Answer

A source ${v}_{s}\left(t\right)=Vcos100\pi t$ has an internal impedance of $\left(4+j3\right)\Omega$ . If a purely resistive load connected to this source has to extract the maximum power out of the source, its value in $\Omega$  should be

##### Show Answer

In the circuit shown below, if the source voltage VS = $100\angle 53.13°$ V then the Thevenin’s equivalent voltage in Volts as seen by the load resistance RL is

##### Show Answer

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