In the circuit shown below, the silicon npn transistor Q has a very high value of $$\beta $$. The required value of R2 i

The ac schematic of an NMOS common-source stage is shown in the figure below, where part of the biasing circuits has bee

In a voltage-voltage feedback as shown below, which one of the following statements is TRUE, if the gain k is increased?

In the circuit shown below, what is the output voltage (vout ) if a silicon transistor Q and an ideal op-amp are used?

In the circuit shown below the op-amps are ideal. Then Vout in Volts is

The bit rate of a digital communication system is R kbits/s. The modulation used is 32-QAM. The minimum bandwidth requir

Bits 1 and 0 are transmitted with equal probability. At the receiver, the pdf of the respective received signals for bot

Bits 1 and 0 are transmitted with equal probability. At the receiver, the pdf of the respective received signals for bot

Let U and V be two independent zero mean Gaussian random variables of variances $${{1 \over 4}}$$ and $${{1 \over 9}}$$

The signal flow graph for a system is given below. The transfer function $$\frac{Y(s)}{U(s)}$$ for this system is

Which one of the following statements is NOT TRUE for a continuous time causal and stable LTI system?

A polynomial $$f\left(x\right)\;=\;a_4x^4\;+\;a_3x^3\;+\;a_2x^2\;+\;a_1x\;-\;a_0$$ with all coefficients positive has

The open-loop transfer function of a dc motor is given as $$\;\frac{\omega\left(s\right)}{V_a\left(s\right)}=\frac{10}{1

The Bode plot of a transfer function G (s) is shown in the figure below. The gain (20 log $$\left| {G(s)} \right|$$

The state diagram of a system is shown below. A system is shown below. A system is described by the state variable equat

The state diagram of a system is shown below. A system is shown below. A system is described by the state variable equat

In the sum of products function f (x,y,z) = $$\sum {} $$m (2,3,4,5), the prime implicants are

A bulb in a staircase has two switches, one switch being at the ground floor and the other one at the first floor. The b

In the circuit shown below, Q1 has negligible collector-to-emitter saturation voltage and the diode drops negligible vol

The divergence of the vector field $$\overrightarrow A\;=\;x{\widehat a}_x\;+\;y{\widehat a}_y\;+\;z{\widehat a}_z$$ is

The return loss of a device is found to be 20 dB. The voltage standing wave ratio (VSWR) and magnitude of reflection coe

A monochromatic plane wave of wavelength $$\lambda = 600$$ is propagating in the direction as shown in the figure below

A monochromatic plane wave of wavelength $$\lambda = 600$$ is propagating in the direction as shown in the figure below

In a forward biased P-N junction diode, the sequence of events that best describes the mechanism of current flow is

In the circuit shown below, the knee current of the ideal Zener diode is 10 mA. To maintain 5V across RL, the minimum va

In IC technology, dry oxidation (using dry oxygen) as compared to wet oxidation (using steam or water vapor) produces

In a MOSFET operating in the saturation region, the channel length modulation effect causes

The small-signal resistance (i.e., $${{d{V_B}} \over {d{I_D}}}$$ ) in $$k\Omega $$ offered by the n-channel MOSFET M sho

The minimum eigenvalue of the following matrix is $$\left[ {\matrix{ 3 & 5 & 2 \cr 5 & {12} & 7

Let $$A$$ be an $$m\,\, \times \,\,n$$ matrix and $$B$$ an $$n\,\, \times \,\,m$$ matrix. It is given that determinant $

Consider a vector field $$\overrightarrow A \left( {\overrightarrow r } \right).$$ The closed loop line integral $$\oint

The divergence of the vector field $$\,\overrightarrow A = x\widehat a{}_x + y\widehat a{}_y + z\widehat a{}_z\,\,$$

Let $$U$$ and $$V$$ be two independent zero mean Gaussian random variables of variances $${1 \over 4}$$ and $${1 \over

Consider two identically distributed zero - mean random variables $$U$$ and $$V.$$ Let the cumulative distribution funct

There are four chips each of 1024 bytes connected to a 16 bit address bus as shown in the figure below. RAMs 1,2,3 and 4

For 8085 microprocessor, the following program is executed. At the end of program, accumulator contains

Consider a delta connection of resistors and its equivalent star connection as shown below. If all elements of the delta

Two magnetically uncoupled inductive coils have Q factors q1 and q2 at the chosen operating frequency. Their respective

Three capacitors C1 ,C2 and C3 whose values are 10 µF, 5µF and 2µF respectively, have breakdown voltages of 10V, 5V, and

Consider the following figure The current IS in Amps in the voltage source, and voltage VS in Volts across the current

Consider the following figure The current in the 1Ω resistor in Amps is

A source vs(t) = V cos 100 $$\pi$$t has an internal impedance of (4 + j3) $$\Omega$$. If a purely resistive load connect

In the circuit shown below, if the source voltage Vs =100$$\angle$$53.130V then the Thevenin’s equivalent voltage in Vol

The following arrangement consists of an ideal transformer and an attenuator which attenuates by a factor of 0.8. An ac

A system is described by the differential equation $$${{{d^2}y} \over {d{t^2}}} + 5{{dy} \over {dt}} + 6y\left( t \right

The DFT of a vector [a b c d] is the vector [α β γ δ ]. Consider the product The DFT of the vector [ p q r s] is a sc

The impulse response of a system is h(t) = t u(t). For an input u(t - 1), the output is

Two system with impulse responses h1(t) and h2(t) are connected in cascade. Then the overall impulse response of the cas

The impulse response of a continuous time system is given by $$h(t) = \delta (t - 1) + \delta (t - 3)$$. The value of th

A band-limited signal with a maximum frequency of 5 kHz is to be sampled. According to the sampling theorem, the samplin

Assuming zero initial condition, the response y (t) of the system given below to a unit step input u(t) is

Let g(t) = $${e^{ - \pi {t^2}}}$$, and h(t) is a filter matched to g(t). If g(t) is applied as input to h(t), then the

For a periodic signal v(t) = 30 sin 100t + 10cos 300t + 6sin $${\rm{(500t + }}\,\pi /4)$$, the fundamental frequency in

The set of values of p for which the roots of the equation 3x2 + 2x + p(p - 1) = 0 are of opposite sign is

Find the sum to n terms of the series 10 + 84 + 734 +.........

A car travels 8 km in the first quarter of an hour, 6 km in the second quarter and 16 km in the third quarter. The avera

In the summer of 2012, in New Delhi, the mean temperature of Monday to Wednesday was 41ºC and of Tuesday to Thursday was

What is the chance that a leap year, selected at random, will contain 53 Sundays?