60601. An amplitude modulated signal occupies a frequency range from 395 kHz to 405 kHz. If can be demodulated by which of the following?
60602. Water has maximum density at?
60603. Radiation efficiency of an antenna is defined as the ratio of
60604. Which of the following factors are responsible to design IC logic gates to operated at a fixed supply voltage of 5 volts? Low heating of IC logic gatesCompatibility with other logic gatesSatisfactory and safe operationStandardization from IC manufacturing point of view. Select the correct answer from the codes given below:
60605. Which of the following meters requires an external power source for its operation?
60606. Which are of the following oscillators is well suited for the generation of wide range audio-frequency sine waves?
60607. The transfer function of a controller is given as Kp + Kd.s where Kp and Kd are constants. What type of controller is this?
60608. Compared to a p-n junction with NA = ND = 1014/cm3, which one of the following statements is TRUE for a p-n junction with NA = ND = 1020/cm3?
60609. Which of the following are universal gates? NANDNORXOR Select the correct answer from the codes given below:
60610. Consider the following statements:
To draw a.c. equivalent circuit of a transistors, all d.c. sources are shorteda.c. sources are shortedd.c. sources are openeda.c. sources are connected to d.c. sources Which of the above statements is/are correct?
60611. How many number of branches the root loci of the equation s(s + 2)(s + 3) + K(s + 2) = 0 have?
60612. For the circuit of the following figure, with an ideal op-amp, the maximum phase shift of the output with reference to the input is :
60613. Consider the function where F(s) is the Laplace transform of f(t). What is the steady-state value of f(t)?
60614. The Nyquist plot of a stable, transfer function G(s) is shown in the figure. We are interested in the stability of the closed loop system in the feedback configuration shown.
Which of the following statements is true?
60615. The output y(t) of a continuous-time system S for the input x(t) is given by:
Which of the following is incorrect?
60616. Consider the following statements regarding the properties of an R-L-C series circuit under resonance: Current in the circuit is in phase with applied voltageVoltage drop across capacitor C and inductance L are equal in magnitude.Voltage across the capacitor is equal in magnitude to the applied voltage.Current in the circuit is maximum. Which of the above statements is/are correct?
60617. Which of the following devices is used at the first stage of an electronic voltmeter?
60618. What is the characteristic of a good control system?
60619. What is the minimum value of VSWR that may exist on a transmission line?
60620. Assertion (A): For same drain current rating N-channel MOSFET occupies more area than p-channel MOSFET.Reason (R): Electron mobility is much higher than hole mobility.
60621. What does a link budget for satellite communication include?
60622. Which one of the following materials is used for making permanent magnets?
60623. Method of images is applicable to which fields?
60624. Identification of highest priority interrupt can be achieved in a minimum time by which of the following schemes?
60625. A super heterodyne receiver has an input circuit tuned to a 570 KHz signal. If the intermediate frequency of the amplifier is tuned to 455 KHz. The quality factor Q for a Image Rejection ratio of 125?
60626. The antenna most commonly used for TV broadcasting in the UHF band is
60627. Which of the following is a microwave power amplifier?
60628. A heavily doped semiconductor exhibits a __________ such a device is called sensistors.
60629. Sampling frequency of
sin 100p t + cos 200p t + sin 100p t + cos 200p t is:
60630. For real and odd signals, the Fourier series coefficient ak is __________ .
60631. Which among the following are known for cooperation and division of labour?
60632. Who developed the concept of time varying electric field producing a magnetic field?
60633. What will be equipotential surfaces for a pair of equal and opposite line charges?
60634. With respect to the differential amplifier configuration shown below, the differential gain Ad will be
Rc = 4.7 KΩ
RE = 2.7 KΩ
hfe = 100
hie = 1 KΩ
RS = 100 Ω
60635. A memory system of size 16 K bytes is required to be designed using memory chips having 12 address lines and 4 data lines-each. The number of such chips required to design and the memory system is :
60636. Provide suitable prepositions: Don’t tamper .........the lock .?
60637. In the graph shown in the figure, for the tree with branches b, d and f the fundamental loops would include c
60638. Which one of the following type of negative feedback increases the input resistance and decreases the output resistance of an amplifier?
60639. A load ZL = RL + jXL is to be matched using an ideal transformer to generator of internal impedance ZS = RS + jXS. The ratio of transformer required is __________ .
60640. An AC source or RMS voltage 20V with internal impedance Zs = (1 + 2j) Ω feeds a load of impedance ZL = (7 + 4j) Ω in the figure below. The reactive power consumed by the load is
60641. Electric dipole is located at origin in a medium with εr = 6, has a moment P = (4ax - 2ay + az ) nC. Then potential at (2, 4, 4) is:
60642. Voice signal band limited to 3.4 KHz is sampled and pulse code modulated using 64 quantization levels. Ten such signals are time division multiplexed using one 5-bit synchronizing word every alternate frame. The minimum channel bandwidth required for transmission of the TDM signal is
60643. Which of the following is/are correct statement(s)? Bus is a group of wires carrying information.Bus is needed to achieve reasonable speed of operation.Bus can carry data or address.A bus can be shared by more than one device. Select the correct answer from the codes given below
60644. Assertion (A): A fixed bias BJT circuit exhibits better performance as compared to a self bias BJT circuit.Reason (R): A fixed bias BJT circuit used less components as compared to a self bias BJT circuit.
60645. A linear time-invariant, causal continuous time system has a rational transfer function with simple poles at s = - 2 and s = - 4, and one simple zero at s = - 1. A unit step u(t) is applied at the input of the system. At steady state, the output has constant value of 1. The impulse response of this system is
60646. The signal cos ωct + 0.5 cos ωmt sin ωct is
60647. Which one of the following is a transferred electron device?
60648. Consider the following statements
A 4 : 16 decoder can be constructed (with enable i/p) by Using four 2 : 4 decoders (each with an enable i/p) onlyUsing five 2 : 4 decoders (each with an enable i/p) onlyUsing two 3 : 8 decoders (each with an enable i/p) onlyUsing two 3 : 8 decoders (each with an enable i/p) only Which of the statements given above is/are correct?
60649. If the carrier modulated by a digital bit stream has one of the possible phases of 0°, 90°, 180° and 270°. Then the modulation is called
60650. The internal resistance of a current source used in the model of a BJT while analyzing a circuit using BJT is :