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You Are On Multi Choice Question Bank SET 1209

60451. What is the purpose of a start in RS232 serial communication protocol?





60452. Time delay produced by an instruction code given below using 2 MHz clock is: MVI A, FFH
LOOP: DCR A
JNZ Loop





60453. Refer to the NAND and NOR latches shown in the figure. The inputs (P1, P2) for both the latches are first made (0, 1) and then, after a few seconds, made (1, 1). The corresponding stable outputs (Q1, Q2) are





60454. Consider the following two statements about the internal conditions in an n-channel MOSFET operating in the active region S1: The inversion charge decreases from source to drain S2: The channel potential increases from source to drain Which of the following is correct?





60455. The wavelength of a wave with propagation constant (0.1p + j0.4p )m-1 is




60456. For what positive value of K does the polynomial s4 + 8s3 + 24s2 + 32s + K have roots with zero real parts?





60457. Which of the following capabilities are available in a Universal Shift Register? Shift leftShift rightParallel loadSerial add Select the correct answer from the codes given below:





60458. A single mode fibre not suffer from which type of dispersion?





60459. Which of the following statements is/are true for a good conductor of electricity? Its conductivity decreases with increasing temperature.Number of free electrons is around 1028 m-3.Its conductivity decreases with addition of impurities.It is a good conductor of heat also.





60460. How can the bandwidth of a control system be increased?





60461. Which of the following one is not a member of French Community?





60462. A signal x1(t) and x2(t) constitute the real and imaginary parts respectively of a complex valued signal x(t). What form of waveform does x(t) possess?





60463. Which of the following can be used as a tachogenerator in control systems?





60464. The dominant mode in a rectangular wave-guide is





60465. First Five Year Plan in independent India was launched in the year .........?





60466. Six sets of electromagnetic waves are given below : 30 - 300 KHz 10 - 30 KHz 3 - 30 MHz 300 - 3000 KHz 30 - 300 MHz > 300 MHz There are designated in the following order





60467. Which among the following waveforms can be reconstructed from its samples without distortion?





60468. For the BJT shown in figure, β = 50, the value of VCE is:





60469. An average response rectifier type electronic voltameter has a d.c. voltage of 10 V applied to it. What is the meter reading?





60470. Consider the common emitter amplifier shown below with the following circuit parameters: β = 100, gm = 0.3861 A/V, r0 = ∞ rp = 259 Ω, Rs = 1 kΩ, RB = 93 kΩ, RC = 250 Ω, RL = 1 kW, C1 = ∞ and C2 = 4.7mF. The lower cut-off frequency due to C2 is





60471. Number of fundamental cut-sets of any graph will be





60472. “Jai Jawan Jai Kisan” slogan is associated with .........?





60473. A message signal x(t) is amplitude modulated with carrier c(t). x(t) = 2 sin 600p t c(t) = 8 cos (2p x 106 t) such that the modulated signal is (8 + 2 sin 600p t) [cos 2p x 106 t] The total side band power is:





60474. The cross section of a JFET is shown in the following figure. Let Va be - 2 V and let Vp be the initial pinch-off voltage. If the width W is doubled (with other geometrical parameters and doping levels remaining the same), then the ratio between the mutual transconductances of the initial and the modified JFET is


60475. Simplify : A + B + A B + (A + B )A B + C(B + AB)




60476. The two broad categories of software are?





60477. A 2 μF capacitor is shunted by a 1 kΩ maintained at temperature 400 K. The rms noise voltage across the capacitor over the entire frequency band is:





60478. Consider the following statements: Acceptor level is formed very close to the conduction band.The effective mass of the free electron is same as that of a hole.The magnitude of the charge of a free electron is same as that of a hole.Addition of donor impurities adds holes to the semiconductor. Which of the above statements are correct?





60479. The following properties are associated with ferroelectric materials: Its susceptibility is negative.The susceptibility is expressed as where c is the Curie constant and Tc is the Curie temperature.It has permanent dipoles oriented randomly. Which of the above statements is/are correct?





60480. Consider the following statements: For a master-slave J-K flip-flop, the toggle frequency is the maximum clock frequency at which the flip-flop will toggle reliably.the data input must precede the clock triggering edge transition time by time minimum time.the data input must remain fixed for a given time after, the clock triggering edge transition time for reliable operation.propagation delay time is equal to the rise time and fall time of the data. Which of the above statements is/are correct?





60481. There are four different algorithms A1, A2, A3 and A4 to solve, a given problem with the complexity order log(n), log(log(n)), n log and n/log(n) respectively. Which is the best algorithm?





60482. A CPU contains............?





60483. The figure below shows a long infinite length conduction placed as shown. Current flowing in a conductor is 2 amps. Then magnetic field at point A is:


60484. Consider the following statements regarding the class-B power amplifiers (Complementary symmetry type): The efficiency of the amplifier is higher than that of class-A amplifierThe power output is lowCrossover distortion is presentThe standby power dissipation is absent. Which of the above statements are correct?





60485. Consider the following statements: For a 10 m long common power line connecting a switch to a light bulb It is a distributed circuit.Time delay for propagation through it is negligible.It is the form of a shielded coaxial cable of circular cross-section.As the intensity of the lamp varies, input impedance of this line also changes. Which of the above statements is/are correct?





60486. The equivalent of the block diagram in figure is given in





60487. For a Hertz dipole antenna, the Half Power Beam Width (HPBW) in the E-plane is





60488. When was ‘Rajiv Gandhi Sadh Bhavana Award’ come to being?





60489. Which of the following is not a conducting material?





60490. Which is India’s most urbanised State?





60491. A person who used his or her expertise to gain access to other people’s computer’s to get information illegally or do damage is a?





60492. A standard waveguide W R90 has inside wall dimensions of a = 2.286 cm and b = 1.016 cm. What is the cut-off wavelength for TE01 mode?





60493. Which of the following statements is not correct for thermistors?





60494. Which one of the following logic families can be operated using a supply voltage from 3 V to 15 V?





60495. The circuit shown in the figure is used to charge the capacitor C alternately from two current sources as indicated. The switches S1 and S2 are mechanically coupled and connected as follow For 2nT ≤ t < (2n + 1)T, (n = 0, 1, 2, ...) S1 to P1 and S2 to P2 For (2n + 1) T ≤ t < (2n + 2)T, (n = 0, 1, 2, ...) S1 to Q1 and S2 to Q2 Assume that the capacitor has zero initial charge. Given that u(t) is a unit step function, the voltage Vc(t) across the capacitor is given be





60496. Which one of the following is a regulated power supply?





60497. The input impedance of figure given below is



60498. A junction FET, can be used as a voltage variable resistor





60499. A fully charged mobile phone with a 12 V battery is good for a 20 minute talktime. Assume that, during the talk time, the battery delivers a constant current of 2 A and its voltage drops linearly from 12 V to 10 V as shown in the figure. How much energy does the battery deliver during this talk time?





60500. In a material, the Fermi level is located between the centre of the forbidden band and the conduction band. Then what is that material?





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