Practice Test: Electronics Engineering (ECE)- 9 - Electronics and Communication Engineering (ECE) MCQ

The fourier sine transform of 

For a series RLC circuit, which one of the following statement is NOT correct

The circuit shown above is initially relaxed. At t = 0, the switch is closed. At t = 1 sec, the current i(t) is

The concentration of minority carriers in an extrinsic semiconductor under equilibrium is

An N-channei JFET has a pinch-off voltage of -4.5V and l_DSS = 9mA. At what value of V_Gs will I_D equal to 3 mA

The ratio of the mobility and the diffusion co-efficient in a semiconductor has units

The input resistance R_i of the amplifier shown is

The cascade amplifier configuration is

The following circuit functions as

For the circuit shown in figure, if the clock frequency is 10KHz, the frequency of the waveform at the output Q is _____________KHz

The Boolean function y = AB + CD is to be realized using only 2-input NAND gates. The minimum number of gates required is __________

The trigonometric fourier series for the wave form shown below contains

Let x(n) and y(n) represents the input and output of a discrete-time system, which one of the following is not a causal system.

The average value (d.c) for the waveform shown below is

Consider an angle modulation signal x(t) = 4 [2π x 10^s t + 3 sin(6000π t) + 4 cos(8000πt)]v.

The average power of x(t) is

For a message signal m(t) = cos(2πfmt) and carrier of frequency f_C, which of the following represents a single side band (SSB) signal

The capacitor of Gaussian channel of band width 4KHz, with noise PSD 10^-9 wHz. When the signal Energy is 0.1. J.

The transfer function of a system is given by  The system is

A 555 astable oscillator with R₁ = 40 kΩ, R₂ = 120 kΩ and C = 4.0 μF will oscillate at

The magnetic field intensity vector of a plane wave is given by   = 10sin (5000t + 0.004x + 30)  where denotes the unit vector in y direction. The wave is propagated with a phase velocity of

In the wave equationwhich term is responsible for attenuation of the wave?

Match each differential equation in Group - I to its family of solution curves from Group - n.

dr where 'c' is curve y = 4x² in xy plane from (0, 0) to (1,4).

For the matrix one of the eigen values of the matrix P is 3, which of the following is

Consider the two independent random vanabies X and Y with identical distnbutions. The variables X and Y take the values 0, 1, 2. 3. 4 with respective probabilities  What is the conditional probability P(X + Y = 4/X - Y = 0)?

The driving point impedance of the foilowing network is given by The component values are