Courses

# Electronics and Communication Engineering (ECE)

Nandani Kumari asked   •  19 minutes ago

## Q: explain briefly how the unpolarized beam falling on the unpolarized target causes interference between the wave describing the particles which are scattered without change of spin direction?

Vivek Raj asked   •  27 minutes ago

## The matrix A is given. Find the state transition matrix A= |2 0| |0 1|​?

Qurat Ul Ain asked   •  1 hour ago

## Which one of the following is a property of the solutions to the Laplace equation : a)The solution have neither maxima nor minima anywhere except at the boundariesb)The solution are not separable in the coordinatesc)The solution are not continuousd)The solution are not dependent on the boundary conditionsCorrect answer is option 'A'. Can you explain this answer?

Ayush Yadav asked   •  1 hour ago

## Examine, Which one of the following statements is true regarding pressure? a. Pressure is a vector quantity b. Pressure is a scalar quantity only when the area is infinitesimally small c. Pressure is a scalar quantity d. Pres... more

Nandani Kumari asked   •  2 hours ago

## With which type of spectroscopy would one observe the pure rotational spectrum of H2? If the bond length of H2 is 0.07417 nm, what would be the spacing of the lines in the spectrum?

Anusri Kothuri As asked   •  2 hours ago

## In circuit given if both Transistors have same VT what is the approximate value of highest possible output voltage vout if vh, can range from 0 to VDD, it is assumed that 0 < vT < VDDa)VDDb)vTc)VDD - vTd)0Correct answer is option 'C'. Can you explain this answer?

Gopal Prasad asked   •  2 hours ago

## The penetration depth of mercury at 3.5 kis 750A . given moleculer weight of hg 200.6 . moleciler density is 13.55×10to the power 3 kg 1. calculate the penetration depth at ok 3. calculate the order parameter w?

SAI VENKAT asked   •  4 hours ago

## If im (t) = tu(t) then i0(t) will bea)e-t u (t) Ab)(1 - e-t) u(t)  Ac)u(t) Ad)(2 - e-t) u(t)  ACorrect answer is option 'B'. Can you explain this answer?

Anshika Verma asked   •  4 hours ago

## If f(D)y=0 be a linear differential equations with constant coefficient then it's auxiliary equation is?

Sneha M Jagdeesh asked   •  4 hours ago

## Explain the decimal representation of prime implicants?

Sanjay Sharma asked   •  4 hours ago

## A line AB 90 mm long included at 45 degree to th H.P and its to view makes an angle of 60 degree with the V.P. The end is in the H.P and 12 mm in front of the V.P .Draw it's deo view and find its true inclination with the V.P... more

Gavva Pavan Ramesh asked   •  4 hours ago

## In each question below are given two statements followed by two conclusions numbered I and II. You have to take the given two statements to be true even if they seem to be at variance from commonly known facts. Read the conclusions and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts. Q. Statements : All apples are oranges Some oranges are papayas Conclusions : I. Some apples are papayas II. Some papayas are apples... more

Raghav Rajawat asked   •  5 hours ago

## Choose the correct sequence :a)ab)bc)cd)dCorrect answer is option 'B'. Can you explain this answer?

Cpallavireddy1999 Pallavi asked   •  5 hours ago

## The solution of  a) y = Ae−x + Be4x + 3 x −4b) y = Ae−x + Be4x + 3 x +4c) y = Ae−x + Be−4x + 3x − 4d) None of theseCorrect answer is option 'D'. Can you explain this answer?

Laxman Badavath asked   •  8 hours ago

## The diode in the circuit of Fig. E4.9 is a large high-current device whose reverse leakage is reasonably independent of voltage. If V = 1 V at 20C, find the value of V at 40C and at?

Kesava Surendra asked   •  9 hours ago

## A lag compensation network(a) increases the gain of the original network without affecting stability.(b) reduces the steady state error.(c) reduces the speed of response(d) permits the increase of gain of phase margin is acceptable.In the above statements, which are correcta)a and bb)b and cc)b, c, and dd)allCorrect answer is option 'D'. Can you explain this answer?

Kavya Sv asked   •  9 hours ago

## The message signal m(t)= sinc(t) sinc^2 (t) modulates the carrier c (t) =Acos2×3.14×fc (t) the band width of modulated signal is?what is the answer?

Kalpu Kalpana asked   •  9 hours ago

## Needed a Test for pn junction diode? Related: Pn Junction Diode - Electronic Devices

Gogula Sivashankar asked   •  9 hours ago

## If the input to the ideal comparator shown in the figure is a sinusoidal signal of 8 V (peak to peak) without any DC component, then the output of the comparator has a duty cycle ofa)1/2b)1/3c)1/6d)1/12Correct answer is option 'B'. Can you explain this answer?

Oruganti Saisharan asked   •  9 hours ago

## It is _________ to read this year’s textbook __________ the last year’s.a)easier, thanb)most easy, thanc)easier, fromd)easiest, fromCorrect answer is option 'A'. Can you explain this answer?

Jeet Sharma asked   •  11 hours ago

## If, then the value of L{tn f(t)} is equal toa)b)c)d)Correct answer is option 'D'. Can you explain this answer?

Raj Dahare asked   •  12 hours ago

## The system y(n) = nx(-n) is a 1. Dynamic 2. Noncausal 3. Linear 4. Time invariant?

Mounika Velaga asked   •  12 hours ago

## The doping concentrations of a silicon pn junction are Nd  = 1016  cm-3 and Na = 8 x 1015  cm-3. The cross-sectional area is 10-3 cm2. The minority carrier lifetimes are   τn0 = 1μs  and  τp0 = 0.1μs. The minority carrier diffusion coefficients are Dn = 35 cm2/ s and Dp = 10 cm2/ s  . The total number of excess electron in the p - region, if applied forward bias is Va = 0.5 V, is... more

Shaktikanta Jena asked   •  14 hours ago

## A lossless coaxial line having inner and outer diameters 5 cm and 10 cm respectively is used as a transmission line for excitation of an antenna with    .The characteristic impedance is ----------------------    (ohms)a)87.1b)458c)25.01d)0.21Correct answer is option 'A'. Can you explain this answer?

Aditi Garg asked   •  14 hours ago

## A car manufacturing company has manufactured a new product line and hired a new manager for the same . however owner of the company and manager have conflicts due to different working styles as owner follows traditional metho... more

Kunal Jha asked   •  15 hours ago

## Needed a Test for number system ,? Related: Digital Electronics?

Asutosh Sahu asked   •  15 hours ago

## Four messages band limited to W , W , 2W and 3W?

G_14_shraman M asked   •  16 hours ago

## If X₁, X2, X3 are linearly independent and K, X, K2 X2 K3 X3 = 0, then a) All K₁, K2, Ka are zero c) K₁, K2, K3 are all equal to 1 b) K₁=0 but K2, K30 d) K₁ K₂=0 but K30?

Rajlaxmi Prajapati asked   •  16 hours ago

## A number P represented in signed binary 2’s complement form is 1001101. Another number Q1 represented in signed binary 2’s complement form is 11010111. If Q is subtracted from P, the result expressed in signed binary 2’s complement forma)10111b)10011c)10110d)10010Correct answer is option 'C'. Can you explain this answer?

Revathi Bandi asked   •  16 hours ago

## The Newton-Raphson method formula for finding the square root of a real number R from the equation x2 − R = 0 isa)b)c)d) None of theseCorrect answer is option 'C'. Can you explain this answer?

Niharika Nikose asked   •  17 hours ago

## What will be the step response of the system where impulse response is h(t) =e-5tu(t)?

Jonny Sounds Sounds asked   •  17 hours ago

## Which of the following term does not involve in ideal gas law? ) Pressure b) Volume c) Temperature d) Time?

Afifa Khan asked   •  18 hours ago

## In the diagram EC and FB are the two rays parallel to the mirror principal axis. Find the condition on q for which constructive interference at point B occurs between the ray ECB and incident ray FB, given AB = d?a)  b)c)d)Correct answer is option 'D'. Can you explain this answer?

Binish King asked   •  20 hours ago

## The poll–zero configuration of a phase–lead compensator is given bya)b)c)d)Correct answer is option 'A'. Can you explain this answer?

Binish King asked   •  20 hours ago

## A process with open–loop modelis controlled by a PID controller. For this purpose(A) the derivative mode improves transient performance(B) the derivative mode improves steady state performance(C) the integral mode improves transient performance(D) the integral mode improves steady state performance.The correct statements area)a and cb)b and cc)a and dd)b and dCorrect answer is option 'C'. Can you explain this answer?

Jagadeesh Ponugupati asked   •  20 hours ago

## A computer has the following negative numbers stored in binary form as shown. The wrongly stored number isa)-37 as 1101 1011b)-89 as 1010 0111c)-48 as 1110 1000d)-32 as 1110 0000Correct answer is option 'C'. Can you explain this answer?

Don P John asked   •  21 hours ago

## If the function    is continuous at x = 0 then find f(0)?a)a − bb)ac)b + ad)None of theseCorrect answer is option 'C'. Can you explain this answer?

Murali Rmurali asked   •  21 hours ago

## One of the parts (A, B, C, D) in the sentence given below contains an ERROR.Which one of the following is INCORRECT ?I requested that he should be given the driving test today instead of tomorrow.a)requested thatb)should be givec)the driving testd)instead of tomorrowCorrect answer is option 'B'. Can you explain this answer?

Cpallavireddy1999 Pallavi asked   •  22 hours ago

## It is given that  y'' + 2y' + y = 0 y(0) = 0 , y(1) = 0 y(0.5) is _______a)0b)1c)2d)3Correct answer is option 'A'. Can you explain this answer?

Kavya Kavyakg asked   •  23 hours ago

## A DC separately excited motor is running 800 rpm driving a load whose torque is constant. Motor armature current is 500 A. The armature resistance drop and rotational losses are negligible. Magnetic circuit can be assumed to ... more

Usha Toppo asked   •  yesterday

## Solve the following using 1's and 2's complement method 39 and -32?

Anirudh Anirudh asked   •  yesterday

## Synchronous detector is used for demodulation of any signal when the modulation index isa)Equal to 1             b)Less than 1             c)Greater than 1         d)Equal to 5 ​Correct answer is 'C'. Can you explain this answer?

Shivam Dubey asked   •  yesterday

## If A is a square matrix of order 3 and |A| = 2 then A (adj A) is equal toa)b)c)d)none of theseCorrect answer is option 'A'. Can you explain this answer?

Pinninti Navya asked   •  yesterday

## Two key barriers to human communication area)distance and ignoranceb)language and costc)distance and languaged)distance and costCorrect answer is option 'D'. Can you explain this answer?

Ganesh Nayak asked   •  yesterday

## Which of the following system is affected by quadrature null effect?a)Synchronousdetector       b)Square law demodulatorc)Envelope detectord)FM receiverCorrect answer is option 'A'. Can you explain this answer?

Srinidhi Akella asked   •  yesterday

## A dsb modulated signal s(t)= Acm(t)cos(2πfct) is multiplied with a local carrier cos(wct π/6). The power of the output signal after passing through the lpf is ____ watts (assume Pm is the power of modulating signal)?

Amulya Elluru asked   •  yesterday

## The quality factor of the given circuit is (where coo is resonance frequency)... more

111ratna Pudota asked   •  yesterday

## We are given a list of integers where the integers are in range 1.n the list has a length of n 1 these properties mean the list must have atleast one duplicate.write a python script to identify the duplicate?

Aniruddha Pawgi asked   •  yesterday

## How many roots of the characteristic equationS5 + S4 + 2S3 + 3S + 1S = 0lies in the left half of S- plane....?(Important - Enter only the numerical value in the answer)Correct answer is '2'. Can you explain this answer?

Asutosh Sahu asked   •  yesterday

## In a digital communication system, the overall pulse shape p(t) at the receiver before the sampler has the Fourier transformation P(f) . If the symbols are transmitted at the rate of 2000 symbols per second, for which of the ... more

Pavan Kalyan Kalyan asked   •  yesterday

## A battery has a short-circuit current of 30 A and an open circuit voltage of 24 V. If the battery is connected to an electric bulb of resistance 2 ohm-1, the power dissipated by the bulb is a)80 W b)1800 W c)112.5 W d)228 W?

Kothapalli Saikrishna asked   •  yesterday

## In good conductors the electric field and magnetic field will be?

Thatajii Orupula asked   •  yesterday

## Maxwell's equations establish the relationship between bar(E) bar(D) bar(H) and bar(B) at any point in a continuous medium.When we move from one medium to another then which of the following statement is correct?

Banothu Srikarthik asked   •  yesterday

## a)3b)2c)4d)Limit does not existCorrect answer is option 'D'. Can you explain this answer?

Vishal Mishra asked   •  yesterday

## The pole-zero diagram of a causal and stable discrete-time system is shown in the figure. Thezero at the origin has multiplicity 4. The impulse response of the system is h[n]. If h[0] = 1,we can concludea)h[n] is real for all nb)h[n] is purely imaginary for all nc)h[n] is real for only even nd)h[n] is purely imaginary for only odd nCorrect answer is option 'C'. Can you explain this answer?

Sanjay Prajapati asked   •  yesterday

## Non-minimum phase transfer function is defined as the transfer functiona)which has zeros only in the left-half s-planeb)which has poles in the right-half s-planec)which has zeros in the right-half s-planed)which has poles in the left-half s-planeCorrect answer is option 'C'. Can you explain this answer?

Rohit Vats asked   •  yesterday

## Needed a Document for topic wise previous year questionfor example in digital section all previous year digital question...if chapter wise then it will be like done pe suhaga? Related: Digital Electronics?

Rajitha Sridhar asked   •  yesterday

## If the voice channel is free in PSTN, then what would be the maximum data rate supported by 3.1 kHz bandwidth of voice channel? a. 2000 bps b. 4000 bps c. 6000 bps d. 8000 bps?

Saksham Khanna asked   •  yesterday

## Needed a Video for analog circuits? Related: Analog Circuits?

Mohana Iswarya asked   •  yesterday

## Find rank of 0 1 -3 -1 1 0 1 1 3 1 0 2 1 1 -2 0?

Sukumaran Charanya asked   •  yesterday

## As compared to an open loop system, a closed loop system isa)more accurate but less stableb)less accurate but more stablec)more accurate as well as more stabled)less accurate as well as less stableCorrect answer is option 'A'. Can you explain this answer?

Pratik Chaudhari asked   •  yesterday

## The equation 3x 11y=k,where k is two digit number ,has exactly 3 solutions in which both x and y are positive integers, which of the following are not the possible value of x? A)5 B)17 C)25 D) 19?

Mohamed Ashiq asked   •  yesterday

## Which of the following system cannot achieve maximum power efficiency compared to others?a)AM                                                               b)DSBc)SSB                                                               d)all with have max efficiencyCorrect answer is option 'A'. Can you explain this answer?

Hemant Chopra asked   •  yesterday

## Voltage e1 is applied to the horizontal input and voltage e2 is applied to the vertical input of a cro. e1 and e2 have the same frequency. the trace is an ellipse. the slope of the major axis is positive. the maximum vertical... more

Spiritiya Fdo asked   •  yesterday

## In the circuit shown below, assume that the diodes D1 and D2 are ideal. The average value of voltage Vab (involts) across the terminals a and b isa)2 Voltb)0 Voltc)-2 Voltd)4 VoltCorrect answer is option 'A'. Can you explain this answer?

Satya Yerroju asked   •  yesterday

## Needed a Document for electronic sciences? Related: Electronic Devices?

Gaurav Kumar asked   •  yesterday

## Typical value of hib in h- parameter a. 25ohm b.50kohm c.100kohm d. 25kohm?

Anumala Krishna Vamsi asked   •  yesterday

## A binary symmetric channel (BSC) has a transition probability of 1/8. If thebinary symbol X is such that P(X = 0) = 9/10, then the probability of error foran optimum receiver will be Correct answer will be   uploaded soon  a)ab)bc)cd)dCorrect answer is option 'A'. Can you explain this answer?

Vishesh asked   •  yesterday

## Needed a Document for electronic devices and circuits? Related: Electronic Devices - Notes, Videos, MCQs & PPTs?

Preman Ottapalam asked   •  yesterday

## The number of cars arriving at ICICI bank drive-in window during 10-min period is Poisson random variable X with b = 2.Que: The probability that no car will arrive isa)0.516b)0.459c)0.246d)0.135Correct answer is option 'D'. Can you explain this answer?

Asusutosh Guru asked   •  yesterday

## In the given circuit, the moving-coil meter gives full-scale deflection reading when the average currentflowing through it is 1mA. The moving coil meter has internal resistance of 50?. Find the value of R that results meter a full scale deflection.a)9950?b)1566.5?c)3133?d)6266?Correct answer is option 'C'. Can you explain this answer?

Ravi Kumar Mishra asked   •  yesterday

## if u(t) is unit step and δ(t) is unit impulse function then Inverse z, Transform of F(z) = 1/z + 1For k > 0 isa)(- 1)k δ(k)                             b)δ(k) - (- 1)kc)(-1)k u(k)           d)u(k) - (- 1)kCorrect answer is option 'B'. Can you explain this answer?

Vishal Wasate asked   •  yesterday

## Y(t)=u(t)*h(t)=? , h(t)= e^2t(t<0) e^-3t(t="">0) Please answer with explaination?

Amit Thakur asked   •  yesterday

## Find whether the following systems are memory-less, Time -invariant, linear, causal, and stable. Justify your answer. a. Y[n]=£?

Anurag Kumar asked   •  yesterday

## Which among the following are the stable discrete time systems?1. y(n) = x(4n)2. y(n) = x(-n)3. y(n) = ax (n) + 8 4. y(n) = cos x(n)a) 1 & 3b)2 & 4c)1, 3 & 4d)1,2,3 & 4Correct answer is option 'B'. Can you explain this answer?

Samatha Varma asked   •  yesterday

## Explain retarded potential?

S T asked   •  yesterday

## The capacity of a memory chip is 8192 bits and it has 2048 rows. Then the organisation of the chip isa)word organizedb)byte organizedc)nibble organizedd)bit organizedCorrect answer is option 'B'. Can you explain this answer?

Ramya Srivalli asked   •  yesterday

## In an unbiased P-N Junction zero current implies thata) The potential biases has disappearedb)No. of holes diffusing from P-side to N-side equals the no. of electrons diffusing from N-side to P-sidec)Total current crossing Junction from P-side to N-side equals the total current crossing Junction from N-side top-sided)No carriers cross the JunctionCorrect answer is option 'C'. Can you explain this answer?

Rajitha Sridhar asked   •  yesterday

## In a waveguide the attention near cutoff frequency ?

Anjan Kumar asked   •  2 days ago

## An ideal pn junction diode is operating in theforward bais region. The change in diode voltage, that will cause a factor of 9 increase in current, isa)83 mVb)59 mVc)43 mVd)31 mVCorrect answer is option 'B'. Can you explain this answer?

Vikas Pandey asked   •  2 days ago

## The PSD and the power of a signal g(t) are respectively Sg(ω) and Pg, the PSD and the power of signal a.g(t) are respectivelya)aS2g (ω) and a2Pgb)aSg2 (ω) and aPgc)aSg (ω) and a2Pgd)aSg (ω) and aPgCorrect answer is option 'A'. Can you explain this answer?

Saurabh Anand asked   •  2 days ago

## For the patterns shown in figure (i) and (ii) if the frequency applied to horizont al plate is 50 Hz t hen,the frequencies of the vert ical plates will be respectivelya)25 Hz and 50 Hzb)100 Hz eachc)25 Hz and 100 Hzd)100 Hz and 50 HzCorrect answer is option 'C'. Can you explain this answer?

N.v.k Reddy asked   •  2 days ago

## Match List-I (Type of compensator) with List-II (Polar plot) and select the correct answer using the code given below the lists:List-I                                                    1.Phase lead                                   2. Phase lag                                    3. Lead-lag                                            A B C(a)123(b) 132(c) 213(d) 231... more

Anant Valekar asked   •  2 days ago

## Consider the following loop             LXI          H, 000AHLOOP : DCX        B             MOV       A, B             ORA       C             JNZ        LOOPThis loop will be executeda)1 timeb)10 timesc)11 timesd)infinite timesCorrect answer is option 'B'. Can you explain this answer?

Rupali Salunkhe asked   •  2 days ago

## The short circuit current of solar cell is the maximum current flowing through it,when * 1 point A. load resistance is zero B. load resistance is ∞ C. voltage is maximum D. light is maximum?

Janmesh Dandekar Dandeka asked   •  2 days ago

## Find the analytic function whose real part is x ³-3xy²?

Sushmita Chandra asked   •  2 days ago

## Assertion (A): Sometimes a quarter wave line is called as impedance inverter.Reason (R): The quarter wavelength line transforms a load impedance ZR that is smaller than Z0 into a value Zs that is larger than Z0 and vice-versa.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false,d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer?

MD ARIF asked   •  2 days ago

## Match the list List-IMaterial usedA. MaganinB. AluminiumC. Phosphor BronzeD. EurekaList-IIPurpose1. Multiplier2. Coils3. Discs4. Control spring5. Shunta)ab)bc)cd)dCorrect answer is option 'B'. Can you explain this answer?

Sai Ram Reddy Bandi asked   •  2 days ago

## For a silicon p+ n  junction diode the doping concentrations are Na = 1018 cm-3 and Nd = 1016 cm-3. The minority carrier hole diffusion coefficient is Dp = 12 cm2 / s and the minority carrier hole life time is     τpo = 10-7 s. The cross sectional area is A =  10-4 cm2. The reverse saturation current is... more

Asutosh Sahu asked   •  2 days ago

## The peak-to-peak input to an 8-bit PCM coder is 2 volts. The Signal power to quantization noise ratio in db is for an sinoisodal input?

Koshika Kaur asked   •  2 days ago

## Architectures of ADSP and TMS Series?

446 Aswini asked   •  2 days ago

## An AM signal is represented in the domain as S (-c) = 4 cos 1800T + 10 cos 20002 + 4cos2200T then the bandwidth of the AM signal is _____ HzCorrect answer is '63.6'. Can you explain this answer?

Sushmita Chandra asked   •  2 days ago

## A transmission line whose characteristic impedance is purely resistivea)must be lossless lineb)must be a distortionless linec)may not be a lossless lined)may not be a distortionless lineCorrect answer is option 'A'. Can you explain this answer?

Vinitha Royal asked   •  2 days ago

## Match List-I with List-ll and select the correct answer using the codes given below the lists:List-I A. Immersion rodB. Air conditionerC. Automatic washing machineD. Automatic control of trafficList-ll1. Open loop control system2. Closed loop control system3. Neither a closed loop nor an open loop systema)ab)bc)cd)dCorrect answer is option 'D'. Can you explain this answer?

Dattasai asked   •  2 days ago

## Find the arc length of curve?

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