60401. Consider a silicon p-n junction at room temperature having the following parameters:
Doping on the n-side = 1 x 1017 cm-3
Depletion width on the n-side = 0.1 μm
Depletion width on the p-side = 1.0 μm
Intrinsic carrier concentration = 1.4 x 1014F. cm-1.
Thermal voltage = 26mV
Permittivity of free space = 8.85 x 10-14F. cm-1.
Dielectric constant of silicon = 12. The peak electric field in the device is
60402. A single turn loop is situated in air, with a uniform magnetic field normal to its plane. The area of the loop is 5 m2 and the rate of change of flux density is 2 Wb/m2/s. What is the emf appearing at the terminals of the loop?
60403. A compensated wattmeter has its reading corrected for error due to which one of the following parameters?
60404. Personal computer cannot be used for which one of the following?
60405. Which of the following output configurations are available in a TTL gate? Open collector outputTotem pole outputTristate output Select the correct answer from the codes given below:
60406. Which of the following be true for a CE transistor amplifier if the emitter resistor value is made equal to zero? Its gain will increaseIts stability will increaseIts gain will decreaseIts stability will decrease Select the correct answer from the codes given below
60407. The feedback control system shown in figure is stable.
60408. Assertion (A): The expression E = - ΔV, where E is the electric field and V is the potential is not valid for time varying fields.Reason (R): The curl of a gradient is identically zero.
60409. At 20 GHz , the gain of a parabolic dish antenna of 1 meter diameter and 70% efficiency is
60410. Hysteresis loss in a transformer working at 220 V and at a frequency of 50 Hz is 100 W. When the transformer is operated at 220 V and at a frequency of 100 Hz, what is the hysteresis loss?
60411. The charity does not consist ......... indiscriminate alms - giving.?
60412. Use correct prepositions wherever necessary. She takes ......... her father .?
60413. The pole-zero plot given below corresponds to a
60414. Given below impulse response of two system
h1(n) = [x(n + 1) - 2x(n) + 3x(n - 1)]
h2(t) = e-2t u(4 - t)
The correct statement is:
60415. The Gain margin for the system with open loop transfer function :
60416. In the circuit shown, what value of RL maximizes the power delivered to RL?
60417. The system which is unstable is __________ .
60418. Which of the following is not an electromagnetic device?
60419. In which direction is the plane wave E = 50 sin (108t + 2z) V/m (where is the unit vector in y-direction), travelling?
60420. Which one of the following compounds is widely used for making ferrites?
60421. Assertion (A): Cut-in voltage for Germanium diode is greater than that for silicon diode.Reason (R): Germanium diode has a higher reverse saturation current than silicon diode.
60422. Laplace transform of unit triplet function is __________ .
60423. What can be the maximum dimension of an array in C language program?
60424. Choose the correct statement
60425. Which of the following modes can exist in a rectangular waveguide?
60426. For plane wave propagating in free space or two conductor transmission line, what must be the relationship between the phase velocity vp , the group velocity vg and speed of light c?
60427. The silicon sample with unit cross-sectional area shown below is in thermal equilibrium. The following information is given: T = 300 K, electronic charge = 1.6 x 10-19C, thermal voltage = 26mV and electron mobility = 1350 cm2/V-s
The magnitude of the electric field at x = 0.5 μm is
60428. Assertion (A): The small signal analysis of a transistor amplifier is done to obtain the current gain, voltage gain and the conversion efficiency of an amplifier.Reason (R): The small signal analysis of a transistor amplifier uses the small signal parameters of the transistor.
60429. Following information is given: x(z) has two poles at z = and z = - 1x(1) = 1, x(- 1) = 1ROC includes Then x(n) is:
60430. Average power for δ(t )dt signal is __________ .
60431. The feedback configuration and the pole-zero locations of G(s) are shown below. The root locus for negative values k, i.e., for -∞ < k < 0, has breakaway/break in points and angle of departure at pole P (with respect to the positive real axis) equal to
60432. Consider the following, logic diagram :
The count sequence of the above logic diagram is :
60433. Which of the following has a major role in implementation of functions calls in C?
60434. Effective Q of the equivalent electrical circuit of quartz crystal is of the order of
60435. Two linearly polarized plane waves A and B travelling in free space in the positive x direction meet at a point. Wave A is polarized in the y direction and the wave B is polarized in the z direction. If the two waves are of equal amplitude and are in phase quadrature, the resultant wave will be
60436. Consider the following statements regarding an antenna: It is a transducerIts performance is essentially frequency sensitiveIt is a reciprocal deviceWith increase in its effective aperture area, width of the radiated beam increases. Which of the above statements are correct?
60437. The range of memory location in given memory interfacing scheme is
60438. What was the first commercial geostationary communication satellite?
60439. Assertion (A): When all inputs of a NAND-gate are shorted to get a one input, one output gate, it becomes an inverter.Reason (R): When all inputs of a NAND-gate are at logic 'O' level, the output is at logic 'I' level.
60440. Which of the following devices has the 'negative resistance' characteristic?
60441. Which of the following may result in instability problem?
60442. Which of the following are included in the architecture of a computer? Addressing modes, CPUInstruction set, data formatsSecondary memory, operating system Select the correct answer from the codes given below:
60443. Consider the CMOS circuit shown, where the gate voltage VG of the n-MOSEFT is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3 V. Assume that, for both transistor, the magnitude of the threshold voltage is 1 V and the product of the transconductor parameter and the (W/L) ratio, i.e. the quality μC0x(W/L), is 1mA. V-2.
For small increase in VG beyond IV, which of the following gives the correct description of the region of operation of each MOSFET?
60444. Two identical NMOS transistors M1 and M2 are connected as shown below. Vbias is chosen so that both transistors are in saturation. The equivalent gm of the pair is defined to be
at constant Vout
The equivalent gm of the pair is
60445. In a digital voltmeter the oscillator frequency is 400 kHz and the ramp voltage falls from 8 V to 0 V in 20 ms. What is the number of pulses counted by the counter?
60446. The Ajanta and Ellora caves are in .........?
60447. Which of the following antennas uses a number of varying length parallel elements?
60448. For a second order instrument, the optimum range of ξ (damping ratio), which gives good frequency response over a wide range of frequencies is
60449. If the connection of two-port is such that the transmission matrix of the overall network is the product of the transmission matrices of the individual networks, what type of connection is it?
60450. A 3 x 8 decoder with two enable inputs is to be used to address 8 blocks of memory. What will be the size of each memory block when addressed from a sixteen bit bus with two MSBs used to enable the decoder?