Multi Option Question Page 1461

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You Are On Multi Choice Question Bank SET 1461

73051. Intersection method of detailed plotting is most suitable for

73052. Stream lines and path lines always coincide in the case of

73053. If in a closed traverse,sum of north latitudes is more than the sum of the South latitudes and also that the sum of west departures is more than the sum of east departures,the bearing of the closing line lies in the

73054. In the circuit shown, in switch S is open for a long time and is closed at t = 0. The current i(t) for t ≥ 0+ is

73055. In a semiconductor material. The hole concentration is found to be 2 x 2.5 x 1015 cm-3. If mobility of carriers is 0.13 m2/ v-s. Then find the current density if electric field intensity is 3.62 x 10-19

73056. Consider the system with and where p and q are arbitrary real numbers. Which of the following statements about the controllability of the system is true?

73057. A MOSFET has a threshold voltage of 1 V and oxide thickness of 500 x 10-8 [εr = 3.9; ε0 = 8.85 x 10-14 F/cm, q = 1.6 x 10-19 c]. The region under the gate is ion implanted for threshold voltage tailoring. The base and type of impant required to shift threshold voltage to - 1 V are __________ .

73058. What is the propagation constant for air filled wave guide with dimensions a = 1.59" and b = 0.795" at 4.95 GHz?

73059. Radiation resistance of an antenna is 54 Ω and loss resistance is 6 Ω. If antenna has power gain of 10, then directivity is:

73060. The inverse of given Laplace transform is

73061. Consider the amplitude modulated (AM) signal Ac cos ωct + 2 cos ωmt cos ωct For demodulating the signal using envelope detector, the minimum value of Ac should be

73062. In a 4 bit weighted resistor D/A converter, the resistor value corresponding to LSB is 32 kΩ. The resistor value corresponding to MSB will be

73063. Find 'X' in the circuit below :f1(A, B, C, D) = Σ(6, 7, 13, 14);f2(A, B, C, D) = Σ(3, 6, 7);f3(A, B, C, D) = Σ(5, 6, 7, 14, 15)

73064. Suppose that the modulating signal is m(t) = 2cos (2p fmt) and the carrier signal is xC(t) = AC cos(2p fct), which one of the following is a conventional AM signal without over modulation?

73065. What are the values of Emax and Emin displayed on the oscilloscope, when a 1 kV P-P carries is modulated to 50%?

73066. 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 resistance seen by the source Vs is

73067. As the temperature increases the mobility of electrons __________ .

73068. Consider the following Maximum energy of electrons liberated photoelectrically is independent of light intensityMaximum energy of electrons liberated photoelectrically varies nonlinearly with frequency of incident light.

73069. When phase-lag compensation is used in a system, then gain cross over frequency, bandwidth and undamped frequency are respectively

73070. The equivalent form of the logical expression A BC + A B C + ABC + ABC + AB C is

73071. The gradient of any scalar field always yields __________ .

73072. In a flash type ADC, employing 15 comparators resolution with 10 volts reference; is expected to be :

73073. During transmission over a communicate channel, bit errors occur independently with probability . If a block of 3 bits are transmitted, the probability of at most one bit error is equal to

73074. If x1[n] x1(z) with ROC = R1 and x2[n] x2(z) with ROC = R2 then ROC for x1[n] + x2[n] will be __________ (where Ri → Region of convergence and x1[n] and x2[n] are causal).

73075. Consider a unity feedback control system with open-loop transfer function The steady state error of the system due to a unity step input is :

73076. The analog signal given below is sampled at 1200 samples per second. m(t) = 2 sin 120 p t + 3 sin 240 p t + 4 sin 360 p t + 5 sin 480 p t + 6 sin 600 p t + 7 sin 720 p t. The folding (maximum) frequency is __________ .

73077. If the system T.F. is The differential equation representing the system is

73078. The antenna current of an AM transmitter is 8 A, when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by a single sine wave. Determine the antenna current when the percent of modulation changes to 0.8

73079. A noiseless 3 KHz channel can transmit binary at the rate __________ .

73080. Find Vx Vy Vz

73081. If x[n] then the sequence x[n] is

73082. The impulse response and the excitation function of a linear time invariant causal system are shown in figure (a) and (b) respectively. The output of the system at t = 2 sec is equal to

73083. Consider a stable and causal system with impulse response h(t) and system function H(S). Suppose H(S) is rational, contains a pole at S = - 2, and does not have a zero at the origin. The location of all other poles and zero is unknown for each of the following statements. Let us determine whether statement is true or false. f[h(t) e-3t] convergesh(t) has finite durationH(s) = H(- s) Choose correct option.

73084. The specific gravity of tungsten is 13.8 and its atomic weight is 184.0 Assume that there are two free elements per atom. Then the Fermi level or characteristic energy for the crystal in eV will be

73085. An air-filled rectangular waveguide has dimensions 8cm x 10cm . The phase velocity of guided wave at frequency of 3 GHz for TE10 mode is

73086. For a = - 1, find the value of V2

73087. A unity-feedback control system has the open loop transfer function . If the input system is a unit ramp, the steady state error will be

73088. For a given voltage, four heating coils will produce maximum heat when connected

73089. Denominator polynomial of a transfer function of certain network is: s3 + s2 + 2s + 24 Then the network is:

73090. A TV picture is to be transmitted over a channel of 6 MHz bandwidth at a 35 dB S/N ratio. The capacity of the channel is

73091. The ratio of the diffusion coefficient in a semiconductor has the units

73092. Consider the probability density f(x) = ae-b|x| where x is a random variable whose allowable values range from x = - ∞ to x = + ∞. P(1 ≤ x ≤ 2)

73093. The amplitude of a pair of composite sinusoidal signal y(n) = x1(n) + x2(n) with x1(n) = sin (5p n) x2(n) = 3 sin (5p n) is __________ .

73094. The amplifier circuit shown below uses a silicon transistor. The capacitors Cc and CE can be assumed to be short at signal frequency and the effect of output resistance r0 can be ignored. If CE is disconnected from the circuit, which one of the following statements is TRUE?

73095. A n-channel JFET has IDSS = 2 mA, Gate to source voltage VGS = - 2 V and trans-conductance is 0.5 mW then pinch-off voltage is __________ .

73096. If we manage to __________ our natural resources, we would leave a better planet for our children.

73097. (2)3 + (3)4 = (?)5

73098. If g(t) = e- p t2 then G(0) is __________ (where g(t)⇔ G(f)

73099. The open loop transfer function of a unity feedback system is: The range of K for which the system is stable is

73100. A discrete time linear shift-invariant system has an impulse response h[n] with h[0] = 1, h[1] = - 1, h[2] - 2, and zero otherwise. The system is given an input sequence x[n] with x[0] - x[2] - 1, and zero otherwise. The number of nonzero samples in the output sequence y[n], and the value of y[2] are, respectively

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73051. Intersection method of detailed plotting is most suitable for (adsbygoogle = window.adsbygoogle || []).push({});