Practice Test: Electronics Engineering (ECE)- 13 - Electronics and Communication Engineering (ECE) MCQ

Refer the below data table and answer the following Question.

If the GDP of the country was $8 trillion at the end of 2011, what was it at the beginning of 2013?

Select the most appropriate synonym of the given word.

Solicit

In the following question, a sentence is given with a blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.

The little boy ran ____ fast that he was ____ for breath.

Select the most appropriate option to fill in the blank.

Although his brother is blind, he is very fast _________ calculations.

The monthly salaries of A. Band C are in the ratio 2 :3 :5. If C's monthly salary is Rs. 12,000 more than that of A, then B's annual salary is

Mathew told his friend Sham, pointing to a photograph, “Her father is the only son of my mother.” The photograph is of whom?

Round-trip tickets to a tourist destination are eligible for a discount of 10% on the total fare. In addition, groups of 4 or more get a discount of 5% on the total fare. If the one-way ticket fare of the trip for single person is Rs 100, a group of 5 tourists purchasing round-trip tickets will be charged Rs____.

In the following figure, the J and K inputs of all the four Flip-Flops are made high. The frequency of the signal at output Y is

Determine V_o (in Volts) in the given network.

Consider the lossless transmission line circuit shown in the figure, The voltage standing wave ratio on 50 Ω line is given by

The output of a continuous-time, linear time-invariant system is represented by T{x(t)} where x(t) is the input signal. A signal z(t) is called eigen-signal of the system T, when T{z(t)} = Y z(t) , where Y is a complex number, in general, and is called an eigen-value of T. Assume the impulse response of the system T is real and even. Then which of the following statements is TRUE?

Given x(t) = e^−tu(t). Find the inverse laplace transform of e⁻³sX(2s).

For the given signal, x(t) = 3 cos 80πt, determine the sampling frequency(in Hz) at which aliasing will take place.

Find the differential equation of the system described by the transfer function given as:

Let the state transition matrix of a system be given as

Then which of the following is equal to φ^-1(t)

The built-in potential of an abrupt p-n junction is 0.75 V. If its junction capacitance (Q) at a reverse bias (V_R) of 1.25 V is 5 pF, the value of C_J (in pF) when V_R = 7.25 V is________.

A Si Solar cell has short-circuited current of 100 mA and open-circuit voltage of 0.7 V under full illumination. If the fill factor is 0.71 then the Maximum power delivered (in mW) to load by this cell is

Assume electronic charge q = 1.6×10⁻¹⁹C, kT/q = 25mV and electron mobility μ_n = 1000cm²/V−s. If the concentration gradient of electrons injected into a P-type silicon sample is 1×10²¹ cm⁴, the magnitude of electron diffusion current density (in A/cm²) is _________.

In an abrupt p-n junction, the doping concentrations on the p-side and n-side are NA = 9 X 10¹⁶ /cm³ and N_D = 1 X 10¹⁶ /cm³ respectively. The p-n junction is reverse biased and the n-side depletion width is 3μm. The depletion width on the p-side is

The voltage gain of an amplifier is 100. A negative feedback is applied with β = 0.04. The overall gain of the amplifier is:

For common emitter input characteristics V_CE is 6V and V_BE is changed from 0.32 to 0.8V also base current changes from 40μA to 60μA, then by using the given data calculate the input impedance (in KΩ) kept V_CE constant.

Consider two resistors of 50 kΩ and 100 kΩ at room temperature of 27ºC. These resistors are passing a signal of bandwidth 50 kHz. Let N₁ and N₂ be the noise voltage generated while operating in series and parallel configuration, respectively. Determine N₁ and N₂.

A receiver has been operating at 290 K and receiving a signal of bandwidth 400 kHz. The amplifier used in the receiver has an average output resistance of 1.5 kΩ. This will lead to Johnson noise voltage of ________ μV.

An amplifier operating over the frequency range of 18 to 20 MHz has a 10kΩ input resistance. The RMS noise voltage at the input to the amplifier at ambient temperature is (assume Boltzman’s constant

The return loss due to a 150W cable terminated by a 100W load is _______________ (in dB)

What is the maximum torque (in Nm) on a square loop of 200 turns in a field of uniform flux density of 1 Wb/m². The loop has 15cm side and carries a current of 5A.

Consider the following sequential circuit consisting of 2 J-K flip flops and D flip flop :

The Mod value for this counter is_____________.