Q1:

$F(x)=\left|\mathrm{Cos}x\right|:-\pi <x<\pi$then the Fourier series coefficient $b_2$is:-.

Q2:

Fourier series of an odd periodic function $f_n$  contains only

Q3:

Trigonometric Fourier series of periodic time function can only have

Q4:

Find inverse Fourier transform of $x(f)=\frac{1}{2+4{\pi }^2{f}^2}$

Q5:

A system has Transfer Function $H(j\omega )=\frac{j\omega +1}{j\omega }$. If sint is input to this system. What will be the output of the system at steady state?

Q6:

$x(t)=\{\begin{array}{l}{e}^{j10t}\left|t\right|<1\\ 0\left|t\right|>1\end{array}$

Find $F\left[x(t)\right]$

Q7:

Find Fourier Transform of x(t) over -1<t<1

Q8:

Calculate Group delay and phase delay of given impulse response for $w=5rad/\sec .$ $H(j\omega )=\frac{1-j\omega }{1+j\omega }$

Q9:

A half-wave rectified sinusoidal waveform has a peak voltage of 10V. Its average value and the peak value of the fundamental component are given by:-

Q10:

Which of the following signal do not have Fourier series?

Q11:

Trigonometric Fourier series of an even function of time does not have which co-efficient of Fourier series:-

Q12:

A periodic rectangular signal, x(t) has the waveform shown in figure. Frequency of the fifth harmonics of spectrum is

Q13:

Which of the following cannot be Fourier series expansion of a periodic signal?

Q14:

If an ac voltage wave is corrupted with an arbitrary no. of harmonics then what will be the effect on peak value, RMS value and avg. value?

Q15:

Periodic signal f(t) of period $t_0$is given by

$f(t)=\langle \begin{array}{l}1;\left|t\right|<T_1\\ 0;T_1<\left|t\right|<\frac{T0}{2}\end{array}$

What will be the d.c component of f(t) ?