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GATE EC question library

Practise GATE EC Electronics and Communication previous year questions free. Browse by subject, syllabus topic, year and question type, with answers and available solutions.

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Official PYQ2012Networks, Signals and SystemsCircuit AnalysisMCQ · 2 marks
The circuit shown is a
Official PYQ2012Networks, Signals and SystemsLTI SystemsMCQ · 2 marks
Let y[n]y[n] denote the convolution of h[n]h[n] and g[n]g[n], where h[n]=(12)nu[n]h[n]=(\frac{1}{2})^nu[n] and g[n]g[n] is a casual sequence. If y[0]=1y[0]=1 and y[1]=12y[1]=\frac{1}{2}, then g[1]g[1] equals
Official PYQ2012Digital CircuitsSequential CircuitsMCQ · 2 marks
The state transition diagram for the logic circuit shown is
Official PYQ2012Analog CircuitsBJT and MOSFET AmplifiersMCQ · 2 marks
The voltage gain AvA_v of the circuit shown below is
Official PYQ2012Networks, Signals and SystemsCircuit AnalysisMCQ · 2 marks
If VA−VB=6 VV_A-V_B=6\:V, then VC−VDV_C-V_D is
Official PYQ2012Engineering MathematicsCalculusMCQ · 2 marks
The maximum value of f(x)=x3−9x2+24x+5f(x)=x^3-9x^2+24x+5 in the interval [1,6][1,6] is
Official PYQ2012Engineering MathematicsLinear AlgebraMCQ · 2 marks
Given that A=[−5−320]A=\begin{bmatrix} -5 &-3 \\ 2 &0\end{bmatrix} and I=[1001]I=\begin{bmatrix} 1 & 0 \\ 0 &1\end{bmatrix}, the value of A3A^3 is
Official PYQ2012Networks, Signals and SystemsCircuit AnalysisMCQ · 2 marks
With 10 V10\:V dc connected at port A in the linear nonreciprocal two-port network shown below, the following were observed: 1 Ω1\: \Omega connected at port B draws a current of 3 A3\:A 2.5 Ω2.5\: \Omega connected at port B draws a current of 2 A2\:A With 10 V10\: V dc connected at port A, the current drawn by 7 Ω7\:\Omega connected at port B is
Official PYQ2012Networks, Signals and SystemsCircuit AnalysisMCQ · 2 marks
With 10 V10\:V dc connected at port A in the linear nonreciprocal two-port network shown below, the following were observed: 1 Ω1\: \Omega connected at port B draws a current of 3 A3\:A 2.5 Ω2.5\: \Omega connected at port B draws a current of 2 A2\:A For the same network, with 6 V6\: V dc connected at port A, 1 Ω1\:\Omega connected at port B draws …
Official PYQ2012Analog CircuitsBJT and MOSFET AmplifiersMCQ · 2 marks
In the three dimensional view of a silicon n-channel MOS transistor shown below, δ=20 nm\delta=20\:nm. The transistor is of width 1 μm1\: \mu m. The depletion width formed at every p-n junction is 10 nm10\:nm. The relative permittivities of SiSi and SiO2SiO_2, respectively, are 11.711.7 and 3.93.9, and ε0=8.9×10−12 F/m\varepsilon_0=8.9 \times 10^{-12} \: F/m. The …
Official PYQ2012Analog CircuitsBJT and MOSFET AmplifiersMCQ · 2 marks
In the three dimensional view of a silicon n-channel MOS transistor shown below, δ=20 nm\delta=20\:nm. The transistor is of width 1 μm1\: \mu m. The depletion width formed at every p-n junction is 10 nm10\:nm. The relative permittivities of SiSi and SiO2SiO_2, respectively, are 11.711.7 and 3.93.9, and ε0=8.9×10−12 F/m\varepsilon_0=8.9 \times 10^{-12} \: F/m. The …
Official PYQ2012Electronic DevicesMCQ · 2 marks
An infinitely long uniform solid wire of radius aa carries a uniform dc current of density j→\overrightarrow{j}. The magnetic field at a distance rr from the center of the wire is proportional to
Official PYQ2012Electronic DevicesMCQ · 2 marks
An infinitely long uniform solid wire of radius aa carries a uniform dc current of density j→\overrightarrow{j}. A hole of radius bb (b < a) ia now drilled along the length of the wire at a distance dd from the center of the wire as shown below. The magnetic field inside the hole is
Official PYQ2012Networks, Signals and SystemsLTI SystemsMCQ · 2 marks
The transfer function of a compensator is given as Gc(s)=s+as+bG_c(s)=\frac{s+a}{s+b} Gc(s)G_c(s) is a lead compensator if
Official PYQ2012Networks, Signals and SystemsLTI SystemsMCQ · 2 marks
The transfer function of a compensator is given as Gc(s)=s+as+bG_c(s)=\frac{s+a}{s+b} The phase of the above lead compensator is maximum at
Official PYQ2011Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The logic function implemented by the circuit below is (ground implies a logic “0”)\text{“0”})
Official PYQ2011Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The output Y\mathrm{Y} in the circuit below is always “1"\text{“1"} when
Official PYQ2010General AptitudeMCQ · 1 mark
Which of the following options is the closest in meaning to the word below: Circuitous
Official PYQ2010General AptitudeMCQ · 1 mark
Choose the most appropriate word from the options given below to complete the following sentence: His rather casual remarks on politics ____________ his lack of seriousness about the subject.
Official PYQ2010General AptitudeMCQ · 1 mark
Hari (H), Gita (G), Irfan (I), and Saira (S) are siblings (i.e. brothers and sisters). All were born on 1st1^{st} January. The age difference between any two successive siblings (that is born one after another) is less than 33 years. Given the following facts: Hari's age ++ Gita's age >> Irfan's age ++ Saira's age. The age difference between …