Practice previous years' questions for Electromagnetics, Antennas, Microwave Engineering, Digital Communication, Signals & Systems, Analog Electronics, VLSI, and Optical Communications.
Marking scheme: +3.00 positive, -0.75 negative (ICRB Standard).
"Cycle Stealing" in microprocessor parlance refers to :
Principle of "locality" is used in context of :
If A, B & C are vectors and $A = 1\cdot u_x + 2\cdot u_y + 3\cdot u_z$, $B = 1\cdot u_x + 1\cdot u_y + 1\cdot u_z$ and $C = 3\cdot u_x + 2\cdot u_y + 1\cdot u_z$, then $(A \times B) \cdot C$ is :
The system of equations
$$x + y + z = 6$$
$$2x + y + z = 7$$
$$x + 2y + z = 8$$
has :
If $x = e^{y + e^{y + e^{y + \dots}}}$, then $\frac{dy}{dx}$ is :
The area bounded by the curves $y^2 = x$ and $y = x$ is given by :
The eigen values of the matrix are
$$\begin{bmatrix} \cos\alpha & \sin\alpha \\ \sin\alpha & \cos\alpha \end{bmatrix}$$
The Laplace Transform of $x(t)$ formed by convolution operator is :
$$x(t) = \{t \cdot u(t)\} * \{\cos(2\pi t) \cdot u(t)\}$$
A random variable X has $\overline{X} = 0$ & $\sigma_X^2 = 1$. Form a new random variable $Y = 2X + 1$. The values of $\overline{Y}$ & $\sigma_Y^2$ are :
Person X can solve 80% of the ISRO question paper and Person Y can solve 60%. The probability that at least one of them will solve a problem from the question paper, selected at random is :
In an amplitude modulated system if the total power is 600W and the power in the carrier is 400W, the modulation index is
The channel capacity under the Gaussian noise environment for a discrete memoryless channel with a bandwidth of 4MHz and SNR of 31 is.
In satellite communication, frequency modulation is used because satellite channel has
For a 3-μm-diameter optical fiber with core and cladding indexes of refraction of 1.545 and 1.510, respectively. The cut off wavelength is.
A 12-bit ADC is operating with a 1 μs clock period and total conversion time is seen to be 14 μs always. The ADC must be of the type
Consider the analog signal $x(t) = 3\cos(100\pi t)$. If the signal is sampled at 200Hz, the discrete time signal obtained will be
In VHDL all the statements written inside a process statement are
A microprocessor with 12-bit address bus will be able to access _____ kilobytes of memory
A practical current source is usually represented by
The dominant mode in a rectangular wave guide is $\text{TE}_{10}$, because this mode has
A PN junction in series with a 100 ohm resistor is forward biased so that a current of 100 mA flows. If voltage across the combination is instantaneously reversed to 10V at time $t = 0$, the reverse current that flows through the junction at $t = 0$ is approximately given by.
Ripple factor for a half wave rectifier is
_____ is a primitive that can execute code. It contains an instruction pointer (=program counter) and sometimes has its own stack
If $\alpha$ and $\beta$ are the roots of the equation $x^2 - px + q = 0$, then $\sum \alpha^2$ is
A signal $m_1(t)$ is band limited to 3.6 kHz and the three other signals $m_2(t)$, $m_3(t)$ and $m_4(t)$ are band limited to 1.2 kHz each, and these signals are transmitted by means of TDM. Then, what will be the transmission bandwidth of the channel.