59651. For a P-N diode, the number of minority carriers crossing the junction depends on
59652. ‘Yorkar’ is related with which game?
59653. Which of the following methods of applying water may be used in rolling land?
59654. At room temperature the current in an intrinsic semiconductor is due to
59655. Work function is the maximum energy required by the fastest electron at 0 K to escape from the metal surface.
59656. The most commonly used semiconductor material is
59657. In which of these is reverse recovery time nearly zero?
59658. A transistor has a current gain of 0.99 in the CB mode. Its current gain in the CC mode is
59659. Following staff readings were taken with a level,the instrument having been moved after third and sixth reading 2,200,1,620,980,250,840,280,600,960,450 If R.L.of first point is 000 m,then RL of last point is
59660. The types of surveying which requires least office work is
59661. Intersection method of detailed plotting is most suitable for
59662. Stream lines and path lines always coincide in the case of
59663. 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
59664. 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
59665. 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
59666. 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?
59667. 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 __________ .
59668. What is the propagation constant for air filled wave guide with dimensions a = 1.59" and b = 0.795" at 4.95 GHz?
59669. Radiation resistance of an antenna is 54 Ω and loss resistance is 6 Ω. If antenna has power gain of 10, then directivity is:
59670. Who has been awarded with the Newcombe Medal?
59671. The inverse of given Laplace transform is
59672. 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
59673. 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
59675. 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?
59676. What are the values of Emax and Emin displayed on the oscilloscope, when a 1 kV P-P carries is modulated to 50%?
59677. 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
59678. As the temperature increases the mobility of electrons __________ .
59679. 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.
59680. When phase-lag compensation is used in a system, then gain cross over frequency, bandwidth and undamped frequency are respectively
59681. The equivalent form of the logical expression A BC + A B C + ABC + ABC + AB C is
59682. The gradient of any scalar field always yields __________ .
59683. In a flash type ADC, employing 15 comparators resolution with 10 volts reference; is expected to be :
59684. Which among the following established in 1968?
59685. 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
59686. 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).
59687. 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 :
59688. 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 __________ .
59689. If the system T.F. is The differential equation representing the system is
59690. Fullerene is an allotrope of?
59691. 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
59692. A noiseless 3 KHz channel can transmit binary at the rate __________ .
59693. Find Vx Vy Vz
59694. If x[n] then the sequence x[n] is
59695. 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
59696. 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.
59697. 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
59698. 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
59699. For a = - 1, find the value of V2
59700. 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