Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | An ac circuit has an impedance of (3 + j6) ohm for fundamental. The impedance for fifth harmonic is |

A. | (15 + j 30) Ω [Wrong Answer] |

B. | (15 + j 6) Ω [Wrong Answer] |

C. | (3 + j 30) Ω [Correct Answer] |

D. | (3 + j 1.2) Ω [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ The polar plot of a transfer function passes through (-1, 0) point. The gain margin is

zero

- 1 dB

1 dB

infinity

⇒ A shadow zone does not receive any space wave

TRUE

FALSE

⇒ To count 1000 bottles in a milk plant, the minimum number of flip flops requires is

12

10

8

6

⇒ In a 3 phase semiconverter, the dc output voltage for a certain firing angle is 50% of the maximum possible value. The firing angle is

30°

60°

90°

120°

⇒ In single tone AM modulation, the transmission efficiency for

*m*= 1 is

0.333

0.5

1

0.1665

⇒ A 10 μF capacitor is charged from a 5 volt source through a resistance of 10 kΩ. The charging current offer 35 m sec. If the initial voltage on C is - 3 V is

0.56 mA

5.6 mA

6 mA

5 μA

⇒ In figure the number of tree branches and links respectively

3 and 2

1 and 3

4 and 1

1 and 4

⇒ Which one of the following parameters does not exist for the two port network shown in the given fig

ABCD

*y*

*h*

*z*

⇒ The PCM signal shown below uses amplitude level of +1 volt and -1 volt to represent binary symbol 0 and 1 respectively. Each code word consists of 4 bits. The sampled version of analog signal from which this PCM signal is derived

EB596

CD231

DA495

25B6A

⇒ If both emitter base and collector base junctions of a BJT are forward biased, the transistor is in

active region

saturated region

cut off region

inverse mode

⇒ In the given figure R

_{C}= R

_{L}= 1 kΩ, then V

_{05 V2.5 V1 V0 V}

⇒ In radar systems PRF stands for

Power Return Factor

Pulse Return Factor

Pulse Repetition Frequency

Pulse Response Factor

⇒ Ridge waveguide is essentially a form of capacitively loaded guide.

TRUE

FALSE

⇒ Hexadecimal number E is equal to binary number

1110

1101

1001

1111

⇒ Consider the following statements about radar Beacon

- It is also called transponder.
- It includes pulse transmitter, receiver and antenna.
- It replies with full power even when the signal receives is weak.

All

1 and 2 only

2 and 3 only

2 only

⇒ In a Communication system, noise is most likely to affect the signal.

at the transmitter

In the channel

in Information source

at the destination

⇒ TTL inverter has

one input

two inputs

one or two inputs

three inputs

⇒ Which of the following is the ferric electric material?

Rochelle salt

Barium titanate

Potassium dihydrogen phosphate

All of the above

⇒ In 8085 microprocessor based system running at 3 MHz clock frequency what should be the minimum pulse width of the INTR signal, so that it is recognized successfully?

0.33 μs

0.666 μs

5.8 μs

none of these

⇒ The transistor specification number 2N refers to

triac

diac

junction transistor

FET with one gate

⇒ When tracing through a resistance we always get a voltage drop.

TRUE

FALSE

⇒ In a circuit of figure, V

_{s}= 10 cos(ω

*t*) power drawn by the 2Ω resistor is 4 watts. The power facto

0.3

0.4

0.6

none

⇒ Consider the amplitude modulated (AM) signal

*A*cos ω

_{c}*+ 2 cos ω*

_{c}t_{m}

*t*cos ω

*For demodulating the signal using envelope detector, the minimum value of A*

_{c}t_{c}should be

2

1

0.5

0

⇒ Discrete transistors T

_{1}and T

_{2}having maximum collector current rating of 0.75 amp are connected in parallel as shown in the figure, this combination is treated as a single transistor to carry a total current of 1 ampere, when biased with self bias circuit. When the circuit is switched on, T

_{1}draws 0.55 amps and T

_{2}draws 0.45 amps. If the supply is kept on continuously, ultimately it is very likely

Both T

_{1}, and T

_{2}get damaged

Both T

_{1}, and T

_{2}will be safe.

T

_{1}Will get damaged and T

_{2}will be safe

T

_{2}will get damaged and T

_{1}, will be safe.

⇒ For stable network, the real part of poles and zeros of driving point function must be

negative

negative or zero

zero

positive

⇒ Noise with uniform power spectral density of N

_{0}ω/H

_{z}is passed through a filter H(ω) = 2 exp (-J ω

*t*) followed by an ideal low pass filter of bandwidth B Hz. The output noise power in watts is

_{y}2 N

_{0}B

4 N

_{0}B

8 N

_{0}B

16 N

_{0}B

⇒ In terms of signum function

*sgn*(

*t*), unit step function

*u*(

*t*) =

1 +

*sgn*(

*t*)

1 -

*sgn*(

*t*)

0.5 + 0.5

*sgn*(

*t*)

0.5 - 0.5

*sgn*(

*t*)

⇒ Which of the following features is not associated with Nichols chart?

(0

*d*B, -180°) point on Nichols chart represent critical Point (-1, 0)

It is symmetric about -180°

M loci are centred about (0 dB, -180°) point

The frequency at intersection of G(

*j*ω) locus and M = +3 dB locus gives bandwidth of closed loop system

⇒ Which of the following identifiers is valid in Pascal?

`THETA`

`NUM `

`1 ST`

`$ BETA`

⇒

**Assertion (A):** In imperfect capacitors, the current does not lead the applied ac voltage by 90°.

**Reason (R):** When subjected to ac fields, the dielectric constant can be expressed as ∈^{'}_{r} - *j*∈^{"}_{r}.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

A is true but R is false

A is false but R is true