60701. Consider the following assertions
SI: For Zener effect at occur, a very abrupt junction is required
S2: For quantum tunnelling to occur, a very narrow energy barrier is required
Which of the following is correct?
60702. Given below a block diagram of oscillator circuit with various reactance elements.
For colpitts oscillator which is correct?
60703. A magnetic field in air is measured to be
What current distribution leads to this field?
[Hint: The algebra is trivial in cylindrical coordinates.]
60704. For a series R-L-C circuit, the characteristic equation is given as
If is denoted by a and by β, then under the condition of β2 > a 2, the system will be
60705. In the epitaxial diffused method of fabricating integrating circuits the process involved are __________ Epitaxial growthDiffusionSilicon diode growthVacuum evaporation of aluminiumPhotoetching The correct order is
60706. The switch in the circuit shown was on position a for a long time, and is moved to position b at time t = 0. The current i(t) for t > 0 is given by
60707. For a standard 2nd order system the maximum overshoot is 10% to an unit step input. If the magnitude of the input is doubled, then maximum overshoot and percentage of maximum overshoot is:
60708. The minimum energy of a photon required for intrinsic excitation is equal to
60709. The circuits with active pull up are preferred because of their stability for
60710. A scheme shown below is to generate a wide band FM modulate signal.
Narrow band FM has carrier frequency = 400 KHz
Deviation ratio = 0.2
Wide band FM has carrier frequency = 100 MHz
Deviation ratio = 6
Local oscillator frequencies can be
60711. How many maximum number of functions can be defined with two symbols which are Boolean in nature:
60712. Name a bio-insecticides to developed on a commerical scale at first?
60713. The OP-AMP circuit shown above represents a
60714. For a periodic signal with finite number of discontinuities in each period, at isolated points of discontinuity the series converges to __________ .
60715. What is the approximate steady state current in the above circuit?
60716. The following graph, the number of trees (P) and the number of cut-sets (Q) are
60717. Which one of the following is used as the interface chip for data transmission between 8086 and a 16-bit ADC?
60718. Which was the labourers organisation formed in 1864?
60719. Assertion (A): An unbiased p-n junction develops a built-in potential at the junction with the n-side positive and the p-side negative.Reason (R): The p-n junction behaves as a battery and supplies current to a resistance connected across its terminals.
60720. The source of immedicate energy for cellular activity is?
60721. Consider the following: OscillatorEmitter followerCascaded amplifierPower amplifier Where of these use feedback amplifiers?
60722. Which of the following photodetector does not provide gain?
60723. Which Gupta ruler had led a compaign to the south and was an expert ‘Veena’ player?
60724. The load end of a quarter wave transformer gets disconnected thereby causing an open-circuited load. What will be the input impedance of the transformer?
60725. Which of the following does not show non-linear V-I characteristics?
60726. The op-amp used in nonlinear mode is
60727. In the following non planar graph number of independent loop equations are
60728. A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1 Ω/m, if the line is distortion less, the attenuation constant (in Np/m) is
60729. A certain 8 bit uniform quantization PCM system can accommodate a signal ranging from - 1 V to + V. The rms value of the signal is V . The signal to quantization noise ratio is:
60730. A rectangular waveguide, in dominant TE mode, has dimensions 10 cm x 15 cm. The cut off frequency is
60731. A radar receiver has a noise figure of 10 dB at 300 K having a bandwidth of 2.5 MHz. The minimum power it can receive is
60732. Oil which has maximum percentage of poly-unsaturated fatty acid is?
60733. The medieval Indian writer who refers to the discovery of America is?
60734. The old name of Human Rights watch was ––––?
60735. The time taken by Mercury to revolve round the sun is?
60736. Which is known as ‘Queen of fruit’?
60737. Match the following: List I (Camera pick up tubes) List II (Developed by) A.CCD charger1.ToshibaB.New vicon2.PhilipsC.Plumbicon3.MatushitaD.Chalnicon4.RCA
60738. Match the following: List I (DOS commands) List II (Meaning) A.ATTRIB1.Displays all directories and subdirectoriesB.SCAN DISK2.Moves files to another directorC.MOVE3.Checks the status of discD.TREE4.Hides a file
60739. Match the following: List I List II A.1.ZeroB.2.0.2C.3.ActuatorD.4.infinity
60740. Match the following: List I List II A.Horn antenna1.High directivityB.Parabolic antenna2.Very high directivityC.Lens antenna3.Moderate directivity
60741. Match the following: List I List II A.TV1.1 kHzB.Radio2.3 kHzC.Telephony3.9 kHzD.Telegraphy4.5 MHz
60742. Match the following: List I (fk) List II [F(z)] A.11.B.kn2.(1 - a z-1)-1C.a k3.- ln (1 - z-1)-1D.4.(1 - z-1)-1
60743. Match the following: List I List II A.p type semiconductor1.siliconB.n type semiconductor2.holes are majority carriersC.Intrinsic semiconductor3.electrons are majority carriersD.Tungsten4.is a metal
60744. Match the following: List I List II A.Resistance1.M-1L-2T2I2B.Inductance2.ML2T-2I-2C.Capacitance3.M-1L-2T4I2D.Reluctance4.ML2T-3I-2
60745. Match the following: List I (Octal) List II (Decimal number)A.351.53B.652.62C.543.29D.764.44
60746. Match the following: List I (Instrument) List II (Measured quantity) A.Hot wire1.only voltageB.PMMC2.phaseC.Electrostatic3.true RMS valueD.Lock in Amplifier4.dc value
60747. Match the following: List I (Laws of Boolean) List II (Relation algebra) A.Distributive law1.x + x = xB.DeMorgans law2.x(y + z) = xy + xzC.Idempotent law3.(x) = xD.Involution law4.(x + y) = xy
60748. Match the following: List I (Library function in Pascal) List II (Type of argument)A.ROUND X1.X in radiansB.ABS X2.X realC.SQR X3.X real or integerD.SIN X
60749. Match the following: List I f(t) List II F (s)A.cos ωt1.B.sin ωt2.C.cosh ωt3.D.sinh ωt4.
60750. Match the following: List I List II A.Resistance1.Current noiseB.Diode2.Partition noiseC.Triode3.Shot noiseD.p-n junction4.Atmospheric noise 5.Johnson noise