GATE EE

Sinusoidal Steady State Analysis

Electric Circuits

(Past Years Questions)

Marks 1

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The mean square value of the given periodic waveform f(t) is_________. ...
GATE EE 2017 Set 2
Find the transformer ratios a and b that the impedance (Zin) is resistive and equal 2.5 Ω when the network is excited wi...
GATE EE 2015 Set 2
An inductor is connected in parallel with a capacitor as shown in the figure. As the frequency of current i is increase...
GATE EE 2015 Set 1
A two phase load draws the following phase currents: $$i_1\left(t\right)=I_m\sin\left(\omega t-\phi_1\right)$$, ...
GATE EE 2012
The average power delivered to an impedance $$\left(4-j3\right)$$ Ω by a current $$5\cos\left(100\mathrm{πt}+100\right)\...
GATE EE 2012
The voltage applied to a circuit is $$100\sqrt2\cos\left(100\mathrm{πt}\right)$$ volts and the circuit draws a current o...
GATE EE 2011
The r.m.s value of the current i(t) in the circuit shown below is ...
GATE EE 2011
The value of $$Z$$ in Fig., which is most appropriate to cause parallel resonance at $$500$$ $$Hz$$ is ...
GATE EE 2004
In a series $$RLC$$ circuit at resonance, the magnitude of the voltage developed across the capacitor
GATE EE 2001
A series $$R-L-C$$ circuit when excited by a $$10$$ $$V$$ sinusoidal voltage source of variable frequency, exhibits reso...
GATE EE 1999
The $$RMS$$ value of half $$-$$ wave rectified symmetrical square wave current of $$2A$$ is
GATE EE 1999
The current in the circuit shown in figure is ...
GATE EE 1999
A sinusoidal source of voltage $$V$$ and frequency $$f$$ is connected to a series circuit of variables resistance, $$R$$...
GATE EE 1998
A circuit with a resistor, inductor and capacitor in series is resonant at $${f_0}\,\,Hz.$$ If all the component values ...
GATE EE 1998
In the circuit shown in Fig. $$X$$ $$-$$ is an element which always absorbs power. During a particular operation, it se...
GATE EE 1996
A series $$R-L-C$$ circuit has the following parameter values: $$R = 10\Omega ,\,\,L = 0.01\,H,\,\,C = 100\,\,m\,\,F.$$...
GATE EE 1995
In the circuit of Figure, Ammeter $${A_2}$$ reads $$12$$ $$A$$ and $${A_3}$$ reads $$9$$ $$A.$$ $${A_1}$$ will read ____...
GATE EE 1995
At resonance, the given parallel circuit constituted by an iron - cored coil and a capacitor behaves like ...
GATE EE 1994
In the following circuit (Fig.) $$i(t)$$ under steady state is ...
GATE EE 1993
The following circuit (Fig.) resonates at ...
GATE EE 1993

Marks 2

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In the circuit shown below, the value of capacitor C required for maximum power to be transferred to the load is ...
GATE EE 2017 Set 2
The circuit below is excited by a sinusoidal source. The value of R, in Ω, for which the admittance of the circuit becom...
GATE EE 2016 Set 1
In the circuit shown below, the supply voltage is 10sin(1000t) volts. The peak value of the steady state current through...
GATE EE 2016 Set 1
In the given network $$V_1=100\angle0^\circ V$$, $$V_2=100\angle-120^\circ V$$, $$V_3=100\angle+120^\circ V$$. The phaso...
GATE EE 2015 Set 2
Two identical coils each having inductance L are placed together on the same core. If an overall inductance of $$\alpha$...
GATE EE 2015 Set 2
A symmetrical square wave of 50% duty cycle has amplitude of ±15V and time period of 0.4$$\mathrm\pi$$ ms. This square w...
GATE EE 2015 Set 2
The circuit shown in the figure has two sources connected in series. The instantaneous voltage of the AC source (in volt...
GATE EE 2015 Set 1
A series RLC circuit is observed at two frequencies. At $$\omega_1$$ = 1k rad / s, we note that source voltage $$V_1=100...
GATE EE 2014 Set 3
The total power dissipated in the circuit, show in the figure, is 1kW. The ideal voltmeter, across the load, reads 200 ...
GATE EE 2014 Set 2
The voltage across the capacitor, as sown in the figure, is expressed as $$$V_c\left(t\right)=A_1\sin\left(\omega_1t-\th...
GATE EE 2014 Set 2
Two magnetically uncoupled inductive coils have Q factors q1 and q2 at the chosen operating frequency. Their respective ...
GATE EE 2013
In the circuit shown, the three voltmeter readings are V1 = 220V, V2 = 122V , V3 = 136V. The power factor of the load i...
GATE EE 2012
In the circuit shown, the three voltmeter readings are V1 = 220V, V2 = 122V , V3 = 136V. If RL=5 Ω , the approximate po...
GATE EE 2012
An RLC circuit with relevant data is given below. The power dissipated in the resistor R is...
GATE EE 2011
An RLC circuit with relevant data is given below. The current $${\underline I}_C$$ in the figure above is ...
GATE EE 2011
The $$R-L-C$$ series circuit shown is supplied from a variable frequency voltage source. The admittance $$-$$ locus of ...
GATE EE 2007
In the figure given below, all phasors are with reference to the potential at point $$''O''.$$ The locus of voltage phas...
GATE EE 2007
The resonant frequency for the given circuit will be ...
GATE EE 2007
The circuit shown in the figure is energized by a sinusoidal voltage source $${V_1}$$ at a frequency which causes resona...
GATE EE 2006
The $$RL$$ circuit of the figure is fed from a constant magnitude, variable frequency sinusoidal voltage source $${V_{I...
GATE EE 2005
In Fig. the admittance values of the elements in Siemens are $${Y_R} = 0.5 + j0,$$ $${Y_L} = 0 - j\,1.5,$$ $${Y_C} = ...
GATE EE 2004
In the circuit of Fig. the magnitudes of $${V_L}$$ and $${V_C}$$ are twice that of $${V_R}$$. The inductance of the coil...
GATE EE 2003
In the circuit shown in Fig. what value of $$C$$ will cause a unity power factor at the $$ac$$ source? ...
GATE EE 2002
A first order, low pass filter is given with $$R = 50\,\,\Omega $$ and $$C$$ $$ = 5\mu F.$$ What is the frequency at wh...
GATE EE 2002
A series $$R-L-C$$ circuit has $$R = 50\Omega ;$$ $$L=100$$ $$\mu H$$ and $$C = 1\,\,\mu F.$$ The lower half power freq...
GATE EE 2002
In the circuit shown in Fig. it is found that the input $$ac$$ voltage $$\left( {{V_i}} \right)$$ and current $$i$$ are...
GATE EE 2002
The impedance seen by the source in the circuit in Fig. is given by ...
GATE EE 2000
If an $$ac$$ voltage wave is corrupted with an arbitrary number of harmonics, then the overall voltage waveform differs ...
GATE EE 2000
A fixed capacitor of reactance –$$j0.02$$ $$\Omega $$ is connected in parallel across a series combination of a fixed in...
GATE EE 1999
The voltage phasor of a circuit is $$10\angle {15^0}\,V$$ and the current phasor is $$2\,\,\angle - {45^0}A.$$ The acti...
GATE EE 1999
Two identical coils of negligible resistance when connected in series across a $$200V,$$ $$50$$ $$Hz$$ source draws, a c...
GATE EE 1997
A coil (which can be modeled as a series $$RL$$ circuit) has been designed for high $$-$$ $$Q$$ performance at a rated v...
GATE EE 1996
In the given circuit, the voltage $$\overline {{V_L}} $$ has a phase angle of ____________ with respect to $$\overline {...
GATE EE 1994

Marks 5

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Determine the resonance frequency and the $$Q$$ $$-$$ factor of the circuit shown in Fig. Data: $$\,\,\,\,\,R = 10\,\...
GATE EE 2001
A circuit consisting of a single resistor $$R$$ and an inductor $$L$$ in series is driven by a $$25$$ $$V$$ $$rms,$$ $$5...
GATE EE 1998
Determine the impedance seen by the source $${V_s} = 24\angle {0^0}$$ in the network shown in Fig. ...
GATE EE 1998

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