Practice Test: Electronics Engineering (ECE)- 7 - Electronics and Communication Engineering (ECE) MCQ

A and B throw a pair cf dice alternately. A wins if he throws 6 before B throws 7 and B wins if he throws 6 before A throws 7. A begins. Find the probability of A losing.

Identify which one of the following is not a tree of the graph shown in the figure

In the circuit below the voltage v(t) is _______________

.

The admittance parameter Y₁₂ in the two port network is ______________ .

A common emitter amplifier shown in the figure is biased using a 1 mA ideal current source. The approximate base current value is 

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

The CMRR of the differential amplifier circuit shown is equal to

Heat sinks are used in power amplifier circuits

A circuit using an op - AMP is shown in the given figure it has

The number of unused states in a 4-bit Johnson counter is _____________

If the output of a logic gate is ‘1’ when all its inputs are at logic 'O' then the gate is either

When two non - linear systems S1 and S2 are connected in cascade the overall system is

The discrete time fourier transform of signal

y(t) = x(t) * h(t) then Express z(t)

The gain margin of a unity feedback control system with the open loop transfer function 

The open-loop transfer function of a feedback control system is    The break-away point of its root locus plot 

A signal m(t) is multiplied by cosine wave form of frequency fc., (m(t) is not a sinusoidal) if fourier transform of m(t) is M(f), then the fourier transform of the product is

Autocorrelation of Non periodic wave form of finite energy and its energy spectral density are

Hilbert transform of a signal is

The magnetic field intensity vector of a plane wave is given by H (x, y, z, t) = 10 sin (1000t + 0.002x + 20) a_y where a_y denotes the unit vector in y-direction. The wave propagating with a phase velocity

Distilled water at 35°C is characterized by    2GHz then its loss tangent is

The orthogonal trajectory of the family of curves xy = k² is

Solve the partial differential equation pe^2y = qe^2x.

The current I in the figure shown below is?