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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 PYQ2012General AptitudeMCQ · 1 mark
If (1.001)1259=3.52(1.001)^{1259}=3.52 and (1.001)2062=7.85,(1.001)^{2062}=7.85, then (1.001)3321=?(1.001)^{3321}=?
Official PYQ2012General AptitudeMCQ · 1 mark
Choose the most appropriate alternative from the options given below to complete the following sentence: If the tired soldier wanted to lie down, he _______ the mattress out on the balcony.
Official PYQ2012General AptitudeMCQ · 1 mark
Choose the most appropriate word from the options given below to complete the following sentence: Given the seriousness of the situation that he had to face, his ___ was impressive.
Official PYQ2012General AptitudeMCQ · 1 mark
Which one of the following options is the closest in meaning to the word given below? Latitude
Official PYQ2012General AptitudeMCQ · 1 mark
One of the parts (A,B,C,D)(A, B, C, D) in the sentence given below contains an ERROR. Which one of the following is INCORRECT? I requested that he should be given the driving test today instead of tomorrow.
Official PYQ2012General AptitudeMCQ · 2 marks
One of the legacies of the Roman legions was discipline. In the legions, military law prevailed and discipline was brutal. Discipline on the battlefield kept units obedient, intact and fighting, even when the odds and conditions were against them. Which one of the following statements best sums up the meaning of the above passage?
Official PYQ2012General AptitudeMCQ · 2 marks
Raju has 1414 currency notes in his pocket consisting of only Rs. 2020 notes and Rs. 1010 notes. The total money value of the notes is Rs. 230230. The number of Rs. 1010 notes that Raju has is
Official PYQ2012General AptitudeMCQ · 2 marks
There are eight bags of rice looking alike, seven of which have equal weight and one is slightly heavier. The weighing balance is of unlimited capacity. Using this balance, the minimum number of weighings required to identify the heavier bag is
Official PYQ2012General AptitudeMCQ · 2 marks
The data given in the following table summarizes the monthly budget of an average household. …
Official PYQ2012General AptitudeMCQ · 2 marks
AA and BB are friends. They decide to meet between 1:001:00pm and 2:002:00 pm on a given day. There is a condition that whoever arrives first will not wait for the other for more than 1515 minutes. The probability that they will meet on that day is
Official PYQ2012Electronic DevicesMCQ · 1 mark
The current ibi_b through the base of a silicon npnnpn transistor is 1+0.1cos⁡(10000πt) mA1+0.1\cos(10000\pi t)\:mA. At 300 K300\:K, the rπr_\pi in the small signal model of the transistor is
Official PYQ2012CommunicationsRandom ProcessesMCQ · 1 mark
The power spectral density of a real process X(t)X(t) for positive frequencies is shown below. The values of E[X2(t)]E[X^2(t)] and ∣E[X(t)]∣\mid E[X(t)] \mid, respectively, are
Official PYQ2012CommunicationsDigital CommunicationsMCQ · 1 mark
In a baseband communications link, frequencies upto 3500 Hz3500\:Hz are used for signaling. Using a raised cosine pulse with 75%75\% excess bandwidth and for no inter-symbol interference, the maximum possible signaling rate in the symbols per second is
Official PYQ2012ElectromagneticsPlane Waves and PropertiesMCQ · 1 mark
A plane wave propagating in air with E→=(8a^x+6a^y+5a^z)ej(ωt+3x−4y) V/m\overrightarrow{E}=(8\hat{a}_x+6\hat{a}_y+5\hat{a}_z)e^{j(\omega t+3x-4y)}\:V/m is incident on a perfectly conducting slab positioned at x≤0x\le0 . The E→\overrightarrow{E} field of the reflected wave is
Official PYQ2012ElectromagneticsPlane Waves and PropertiesMCQ · 1 mark
The electric field of a uniform plane electromagnetic wave in free space, along the positive xx direction, is given by E→=10(a^y+ja^z)e−j 25x\overrightarrow{E}=10(\hat{a}_y+j\hat{a}_z)e^{-j\:25x}. The frequency and polarization of the wave, respectively, are
Official PYQ2012Digital CircuitsSequential CircuitsMCQ · 1 mark
Consider the given circuit. In the circuit, the race around
Official PYQ2012Digital CircuitsCombinatorial CircuitsMCQ · 1 mark
The output YY of a 2−bit2-\text{bit} comparator is logic 11 whenever the 2−bit2-\text{bit} input AA is greater than the 2−bit2-\text{bit} input BB. The number of combinations for which the output is logic 11, is
Official PYQ2012Electronic DevicesMCQ · 1 mark
The i−vi-v characteristics of the diode in the circuit given below are i={v−0.07500 A,v≥0.7 V        0 A,v<0.7 Vi = \begin{cases} \frac{v-0.07}{500}\:A, & v\ge0.7\:V \\ \:\:\:\:\:\:\:\:0\:A, & v \lt 0.7\:V \end{cases} The current in the circuit is
Official PYQ2012Electronic DevicesMCQ · 1 mark
In the following figure, C1C_1 and C2C_2 are ideal capacitors. C1C_1 has been charged to 12 V12\:V before the ideal switch SS is closed at t=0t=0. The current i(t)i(t) for all tt is
Official PYQ2012ElectromagneticsMaxwell's EquationsMCQ · 1 mark
The average power delivered to an impedance (4−j3) Ω(4-j3)\:\Omega by a current 5cos⁡(100πt+100) A5\cos(100\pi t+100)\:A is