The Antenna current of an AM transmitter is 9A, when only the carrier is sent. But it increases to 9.36A when the carrier is modulated by a single sine wave. Then the percentage of modulation is

- a)70.1%
- b)40.4%
- c)89.8%
- d)20.6%

Correct answer is option 'B'. Can you explain this answer?

Ratnesh Yadav answered • 2 hours ago

P. An 8-bit wide 4-word sequential memory will have

Q. A 256 x 4 EPROM has

1. 8 fixed AND gates and 4 programmable OR gates

2. Eight, 4 bit shift registers

3. 4 words of 32 bits each

4. 8 address pins and 4 data pins output

Q. A 256 x 4 EPROM has

1. 8 fixed AND gates and 4 programmable OR gates

2. Eight, 4 bit shift registers

3. 4 words of 32 bits each

4. 8 address pins and 4 data pins output

- a)A
- b)B
- c)C
- d)D

Correct answer is option 'D'. Can you explain this answer?

Subhashi Dahal answered • 2 hours ago

Pushkar Malik asked • 4 hours ago

An air filled rectangular waveguide with dimension where b < a < 2b is to be constructed to operate at 3GHz in dominant mode. The design frequency is at least 20% higher than the cut-off frequency of dominant mode and also at least 20% below, cut off frequency of next higher mode, determine the phase velocity.

- a)
- b)
- c)
- d)

Correct answer is option 'B'. Can you explain this answer?

Saryu Bakshi asked • 4 hours ago

X is a binary memory less source with P(x=0) = 0.3. This source is transmitted over a binary symmetric channel with crossover probability P = 0.1. Assume that the source is directly connected to the channel, i.e. no coding is employed. Then the error probability at the destination is

- a)0.2
- b)0.3
- c)0.6
- d)0.1

Correct answer is option 'D'. Can you explain this answer?

Shweta Gupta asked • 5 hours ago

Let for real x. From among the following, choose the Taylor series approximation of f(x) around x = 0, which included all powers of x less than or equal to 3.

- a)1 + x + x
^{2}+ x^{3} - b)
- c)
- d)1 + x + 3x
^{2}+ 7x^{3}

Correct answer is option 'C'. Can you explain this answer?

The interrupt pin TRAP of a 8085 microprocessor is

- a)edge triggered
- b)level triggered
- c)both edge and level triggered
- d)neither edge nor level triggered

Correct answer is option 'C'. Can you explain this answer?

Shivani Sharma answered • 2 hours ago

TRAP is an interrupt in 8085 microprocessor which is both edge and level triggered.

i_{1} , i_{2} = ?

- a)2.6 A, 1.4 A
- b)2.6 A, -1.4 A
- c)1.6 A, 1.35 A
- d)1.2 A, -1.35 A

Correct answer is option 'D'. Can you explain this answer?

Kulwantkaur answered • 2 hours ago

i_{x} = i_{1} - i_{2}

15 = 4i_{1} -2(i_{1} - i_{2}) + 6(i_{1} - i_{2})

⇒ 8i_{1} - 4i_{2} = 15 ..........(i)

-18 = 2i_{2} + 6(i_{2} -i_{1})

⇒ 3i_{1} -4i_{2} = 9 ..........(ii)

i_{1} =1.2 A, i_{2} = -1.35 A

15 = 4i

⇒ 8i

-18 = 2i

⇒ 3i

i

Two lamps each of 230V and 60W rating are connected in series across a single phase 230V supply. The total power consumed by the two lamps would be

- a)120 W
- b)60 W
- c)30 W
- d)15 W

Correct answer is option 'C'. Can you explain this answer?

Rajni answered • 2 hours ago

Resistance of each lamp

Hence Total resistance offered by 2 these lamps

So total power consumed by two lamps

When two non - linear systems S1 and S2 are connected in cascade the overall system is

- a)non - linear.
- b)linear.
- c)neither linear nor non linear.
- d)non - linear but stable.

Correct answer is option 'B'. Can you explain this answer?

Manish Rathi answered • 13 hours ago

Y(t) - Si * S2 = linear

Exponential of any signal as non - linear

logarithm of any signal is non - linear

When two linear systems are connected in cascaded the

system is non - linear

Sim tarty two non linear systems are connected in cascaded then the system is linear

Exponential of any signal as non - linear

logarithm of any signal is non - linear

When two linear systems are connected in cascaded the

system is non - linear

Sim tarty two non linear systems are connected in cascaded then the system is linear

Tanya Satija asked • 9 hours ago

Ready signal is used to

- a)synchronize fast peripherals with microprocessor
- b)synchronize slow peripherals with microprocessor
- c)send request to microprocessor for direct memory access
- d)send request to microprocessor for interrupt subroutines

Correct answer is option 'B'. Can you explain this answer?

The admittance parameters of a two-port network shown in figure, given by Y_{11} = 2 mho, Y,_{12} = -0.5 mho, Y_{21} = 4.8 mho, Y_{22} = 1mho. The output port is terminated with a load admittance Y_{L} = 0.2 mho.

Q.

The value of V2 for V1 = 10 ∠0° volts is

- a)12.5 ∠180° V
- b)12.5 ∠0°V
- c)40 ∠1B0°V
- d)40 ∠0°V

Correct answer is option 'C'. Can you explain this answer?

Bronica Meena answered • 13 hours ago

A fair dice is tossed two times. The probability that the second results in a value that is higher than the first toss is:

- a)2/6
- b)1/2
- c)1/18
- d)5/12

Correct answer is option 'D'. Can you explain this answer?

Jaya Karan Surya answered • 13 hours ago

In the first toss, results can be 1, 2, 3, 4, 5

For 1, the second toss results can be 2, 3, 4, 5, 6

For 2, the second toss results can be 3, 4, 5, 6

For 3, the second toss results can be 4, 5, 6

For 4, the second toss results can be 5, 6

For 5, the second toss results can be 6

So the required probability

For 1, the second toss results can be 2, 3, 4, 5, 6

For 2, the second toss results can be 3, 4, 5, 6

For 3, the second toss results can be 4, 5, 6

For 4, the second toss results can be 5, 6

For 5, the second toss results can be 6

So the required probability

A vessel has 10 ml of a solution of milk and water containing 20% milk, x ml of milk was added to the vessel to reverse this ratio, y ml of water was then added to the vessel to reverse the ratio once again. Find x + y.

- a)140
- b)150
- c)160
- d)170

Correct answer is option 'B'. Can you explain this answer?

Ratnam Sinha answered • 13 hours ago

A lossless transmission line is terminated in a load which reflects a parts of the incident power. The measured VSWR is 2. The percentage of the power that is reflected back is _____________

- a)11.11
- b)11.15
- c)2.5
- d)12.02

Correct answer is option 'A'. Can you explain this answer?

Rashola Chauahary answered • yesterday

The following message signal m(t) is given to both frequency modulator and phase modulator. If

the maximum phase deviation of both FM and PM is same, determine the Kf/Kp.

the maximum phase deviation of both FM and PM is same, determine the Kf/Kp.

- a)4π
- b)1/8π
- c)1/4π
- d)8π

Correct answer is option 'C'. Can you explain this answer?

BK Deepika answered • yesterday

and maximum phase-deviation of

FM signal

FM signal

Some advantages of optical fibre cables are

- small diameter
- Immunity to cross talk and EM interference
- Laser and LED modulation methods lend themselves ideally to digital operation

- a)1 only
- b)1 and 2
- c)1, 2, 3
- d)2, 3

Correct answer is option 'C'. Can you explain this answer?

Diksha Arora answered • yesterday

Fibre optic cables have all these advantages.

Anumala Krishna Vamsi asked • 14 hours ago

A binary symmetric channel (BSC) has a transition probability of 1/8. If the

binary symbol X is such that P(X = 0) = 9/10, then the probability of error for

an optimum receiver will be

binary symbol X is such that P(X = 0) = 9/10, then the probability of error for

an optimum receiver will be

- a)a
- b)b
- c)c
- d)d

Correct answer is option 'A'. Can you explain this answer?

A TV receiver has a width of 60 cm. The aspect ratio is 4/3. The required EHT supply is about

- a)29 kV
- b)2.9 kV
- c)45 kV
- d)4.5 kV

Correct answer is option 'A'. Can you explain this answer?

Sonali Jha answered • yesterday

EHT supply is 1 kV per diagonal inch.

Height = 60 x = 45 cm.

Diagonal = .

Which one of the following is non-resonant antenna?

- a)Folded dipole
- b)Broad side array
- c)End fire array
- d)Rhombic antenna

Correct answer is option 'D'. Can you explain this answer?

Shubhangi Kumar answered • yesterday

Rhombic antenna is a non-resonant antenna capable of operating over 3 to 30 MHz range.

Vidicon and plumbicon operate on the principle of

- a)photo conduction
- b)photo emission
- c)photo voltaic
- d)none of the above

Correct answer is option 'C'. Can you explain this answer?

Ekta Chauhan answered • yesterday

Photo conduction uses the fact that resistivity of some materials depends on intensity of light falling on their surface.

If Î³ = (S_{0}/N_{0})/(S_{i}/N_{m}) where S_{0} and S_{1} are signal power output and signal power input and N_{0} and N_{m} are noise power output and noise power input, the value of Î³ for SSB-SC and DSB-SC amplitude modulated system respectively are

- a)1 and 1
- b)1 and 2
- c)2 and 1
- d)0.5 and 0.5

Correct answer is option 'A'. Can you explain this answer?

Md Shaik Junaid answered • yesterday

SSB - SC and SSB - DB have Î³ = 1 and are similar from noise point.

The two-level semi-random binary process is defined by X(t) = A or -A

where (n-1)T < t < nt and the levels A and -A occur with equal probability. T is a positive constant and

Que: The mean value E[X(t)] is

- a)1/2
- b)1/4
- c)1
- d)0

Correct answer is option 'D'. Can you explain this answer?

Pooja Yadav answered • yesterday

Armstrong F.M. transmitter performs frequency multiplication in stages

- a)to increase the overall S/N
- b)for convenience
- c)to reduce the bandwidth
- d)to find the desired value of carrier frequency with frequency deviation

Correct answer is option 'D'. Can you explain this answer?

Lovika Chauhan answered • yesterday

where (Î”*f*) is the frequency deviation.

The total number of pulses in a TV remote control is

- a)14
- b)12
- c)10
- d)8

Correct answer is option 'A'. Can you explain this answer?

Deep Jain answered • yesterday

The 14 pulses are preliminary pulse, start pulse, stop pulse and 11 other pulses.

Consider the Bode plot of a ufb system shown in fig.

Q. The steady state error corresponding to a rampinput is

- a)0.25
- b)0.2
- c)0
- d)∞

Correct answer is option 'A'. Can you explain this answer?

Tanya Satija answered • yesterday

The Bode plot is as shown in fig.

Preet Singh Negi asked • 19 hours ago

A black and white television picture may be viewed as consisting of approximately 3x10^{5} elements, each of which may occur one of 10 distinct brightness levels with equal probability. Transmission rate is 30 picture frames/ second and SNR is 30 dB. Then the minimum bandwidth required to support the transmission of the resulting video signal is MHz

Correct answer is '3'. Can you explain this answer?

Divya Rana asked • 19 hours ago

An unregulated power supply of 25 V is connected to zerer diodes and p - n diodes (cut in voltage 0.7V) as shown in figure, then the values of x and y, 7 are?

- a)+ 8.6V, + 9.3V, + 10V
- b)-8.6V,-9.3V, +10V
- c)+11.4V, + 10.7V, +10V
- d)-11.4V,-10.7V, +10V

Correct answer is option 'C'. Can you explain this answer?

Arpan Jain asked • 19 hours ago

Read the comprehension and answer the questions that follow: Detective glories tend to glorify crime. Murderers, gangsters and crooks all kinds are described as tough, cunning and courageous individuals who know how to take care of themselves and how to get what they want. In James McCain's The Postman Always Rings twice, for instance the villain is much more a impressive character than his victim. He is casual brave smart and successful with women. It is true that he finally gets caught. But he is punished for a crime that he did not commit, so that his conviction is hardly a triumph of justice. Besides, looking back over the exciting life of the criminal, the reader might conclude that it was worth the risk.

Q.

The passage mention James McCain

- a)as an author of detective stories
- b)as brave, smart, and successful with women
- c)as tough cunning and courageous
- d)as being more impressive than others

Correct answer is option 'A'. Can you explain this answer?

Neha Lohia asked • yesterday

The circuit using a BJT with β = 50 and V_{BE} = 0,7 V is shown is figure. The base current l_{B} and collector V_{C} are respectively.

- a)43 μA and 11.4 Volts
- b)40 μA and 14 Volts
- c)45 μA and 11 Volts
- d)50 μA and 10Volts

Correct answer is option 'B'. Can you explain this answer?

Vandana Mamman asked • yesterday

An npn bipolar junction transistor (BJT) is operating in the active region. If the reverse bias across the base – collector junction is increased, then

- a)the effective base width increases and common – emitter current gain increases
- b)the effective base width increases and common – emitter current gain decreases
- c)the effective base width decreases and common – emitter current gain increases
- d)the effective base width decreases and common – emitter current gain decreases

Correct answer is option 'C'. Can you explain this answer?

Vinitha Royal asked • yesterday

Match List-I with List-ll and select the correct answer using the codes given below the lists:

List-I

A. Immersion rod

B. Air conditioner

C. Automatic washing machine

D. Automatic control of traffic

List-ll

1. Open loop control system

2. Closed loop control system

3. Neither a closed loop nor an open loop system

List-I

A. Immersion rod

B. Air conditioner

C. Automatic washing machine

D. Automatic control of traffic

List-ll

1. Open loop control system

2. Closed loop control system

3. Neither a closed loop nor an open loop system

- a)a
- b)b
- c)c
- d)d

Correct answer is option 'D'. Can you explain this answer?

P Naishnavi asked • yesterday

The dependence of drift velocity of electrons on electric field in a semiconductor is shown below. The semiconductor has a uniform electron concentration of and electronic charge . If a bias of 5V is applied across a 1 mm region of this semiconductor, the resulting current density in this region, in kA/cm^{2}, is _________.

Correct answer is '1.5 to 1.7'. Can you explain this answer?

Saryu Bakshi asked • yesterday

For the circuit shown in figure diode cut in voltage is V_{in} = 0. T he Ripple voltage to not more than V_{rip}= 4V.

The min load resistance(in k), that can be corrected to the output is

The min load resistance(in k), that can be corrected to the output is

____________________

Correct answer is between '6.20,6.30'. Can you explain this answer?

Piyush Kumar asked • yesterday

In the voltage reference circuit shown in the figure, the op-amp is ideal and the transistors Q_{1} Q_{2}….., Q_{32} are identical in all respects and have infinitely large values of common – emitter current the relation I_{C} = I_{S} exp ((V_{BE}/V_{T}), where Is is the saturation current. Assume that the voltage V_{P} shown in the figure is 0.7 V and the thermal voltage V_{T} = 26mV.

The output voltage V_{out}(in volts) is __________.

Correct answer is '1.1 to 1.2'. Can you explain this answer?

Kunal Rauthan asked • yesterday

Assertion (A): The writing of a program in assembly language is much easier and faster as compared to the writing of program in machine language.

Reason (R): An assembly language is a low- level language

Reason (R): An assembly language is a low- level language

- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true

Correct answer is option 'B'. Can you explain this answer?

Lakshmi Priya Ghildiyal asked • yesterday

Assertion (A): The emitter follower inherently exhibits 100% negative feedback.

Reason (R): The emitter follower is an example of voltage-series feedback.

Reason (R): The emitter follower is an example of voltage-series feedback.

- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.

Correct answer is option 'B'. Can you explain this answer?

Geet Naman asked • yesterday

The frequency response of a microphone means

- a)bandwidth of frequencies having output with in ï¿½ 1 dB of the output at 1000 Hz
- b)bandwidth of frequencies having output with in ï¿½ 3 dB of the output at 1000 Hz
- c)bandwidth of frequencies having output with in ï¿½ 1 dB of the output at 500 Hz
- d)bandwidth of frequencies having output with in ï¿½ 3 dB of the output at 500 Hz

Correct answer is option 'A'. Can you explain this answer?

Aakash Pandey asked • yesterday

An amplifier operating over a frequency range of 18 to 20 MHz has 10 kΩ input resistance. At a temperature of 27º C, the noise voltage at input of amplifier is (Boltzman constant *k* = 1.38 x 10^{-23} J/K)

- a)18.2 μV
- b)182 μV
- c)16.2 μV
- d)162 μV

Correct answer is option 'A'. Can you explain this answer?

Shivani Sharma asked • yesterday

The magnetic field intensity vector of a plane wave is given by H (x, y, z, t) = 10 sin (1000t + 0.002x + 20) a_{y} where a_{y} denotes the unit vector in y-direction. The wave propagating with a phase velocity

- a)5 x 10
^{5}rad/s - b)50 x 10
^{5}rad/s - c)25 x 10
^{5}rad/s - d)150 x 10
^{5}rad/s

Correct answer is option 'A'. Can you explain this answer?

Astha Jain asked • yesterday

The tape recorders used in homes have

- a)common head and common amplifier system for recording and playback
- b)different heads and amplifiers for recording and playback
- c)same head but different amplifiers for recording and playback
- d)different heads but same amplifier for recording and playback

Correct answer is option 'A'. Can you explain this answer?

Geetanjali asked • yesterday

The advantages of class B as compared with class A operation are

1. efficiency is higher.

2. possible to obtain greater power output.

3. less distortion and noise interference.

4. negligible power loss at no input signal. Of these the statements:

1. efficiency is higher.

2. possible to obtain greater power output.

3. less distortion and noise interference.

4. negligible power loss at no input signal. Of these the statements:

- a)2 and 3 are correct
- b)1,2,3 and 4 are correct
- c)1,2 and 4 are correct
- d)2,3 and 4 are correct

Correct answer is option 'C'. Can you explain this answer?

Mahithaa asked • yesterday

Consider the following statements associated with data representation by 1’s and 2‘s complements:

1. The 2’s complement system requires only one arithmetic operation.

2. The 1 ’s complement system requires two arithmetic operations.

3. The 1 's complement is often used in logical manipulations for inversion operation.

4. The 2 ’s complement is used only for arithmetic applications.

1. The 2’s complement system requires only one arithmetic operation.

2. The 1 ’s complement system requires two arithmetic operations.

3. The 1 's complement is often used in logical manipulations for inversion operation.

4. The 2 ’s complement is used only for arithmetic applications.

Which of the statements given above are correct?

- a)1 , 2 , 3 and 4
- b)1 ,3 and 4
- c)2, 3 and 4
- d)1,2 and 3

Correct answer is option 'A'. Can you explain this answer?

Chandan Sharma asked • 2 days ago

The concentration of minority carriers in an extrinsic semiconductor under equilibrium is

- a)directly proportional to the doping concentration.
- b)inversely proportional to the doping concentration.
- c)directly proportional to the intrinsic concentration.
- d)inversely proportional to the intrinsic concentration.

Correct answer is option 'B'. Can you explain this answer?

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