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. | A Discone antenna is |

A. | a combination of disk and cone in close approximity [Correct Answer] |

B. | a combination of disk and cone at λ/4 spacing [Wrong Answer] |

C. | a combination of disk and cone far apart [Wrong Answer] |

D. | a combination of disk and cone at λ/2 spacing [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss 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 :**

⇒ A 4 input AND gate is equivalent to

4 switches in parallel

2 switches in series and 2 in parallel

three switches in parallel and one in series

4 switches in series

⇒ A transmitter serial current contains

carrier frequencies

audio frequencies

radio frequencies

none of the above

⇒ The minimum step size required for a Delta modulator operating at 36 samples/sec to track the signal (here

*u*(

*t*) is the unit step function)

*x*(

*t*) = 125

*t*(

*u*(

*t*) -

*u*(

*t*- 1)) + (250 - 125

*t*) (

*u*(

*t*- 1) -

*u*(

*t*- 2)) So that slope overload is avoided, would be

2

^{-10}

2

^{-8}

2

^{-6}

2

^{-4}

⇒ In a power diode the reverse recovery time is the time from the instant the forward current is zero to the instant when reverse recovery current has decayed to

50% of peak reverse current

25% of peak reverse current

10% of peak reverse current

zero value

⇒ Consider the voltage transfer characteristic of a standard CMOS inve

NMOS and PMOS triode

Both are saturation

NMOS saturated PMOS linear

None of these

⇒ There are four different algorithms A1, A2, A3 and A4 to solve, a given problem with the complexity order log(n), log(log(n)), n log and n/log(n) respectively. Which is the best algorithm?

A1

A2

A3

A4

⇒ A system has its two poles on the negative real axis and one pair of poles lies on

*j*ω axis. The system is

stable

unstable

limitedly stable

either (a) or (c)

⇒ At room temperature a semiconductor material is

perfect insulator

conductor

slightly conducting

any of the above

⇒ Two numbers are 131 ± 5 and 629 ± 3. The sum of the numbers with range of doubt is

760 ± 8

760 ± 2

760 + 8

760 - 8

⇒ The A.C. resistance of the emitter diode will be

5.05 Ω

50.5 Ω

505 Ω

5050 Ω

⇒ The frequency response of an ideal tuned amplifier should be as represented in figur

A

B

C

D

⇒ 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 cycl

42737

42738

42741

42747

⇒ Which of the following statement is correct?

A FET is a current controlled device

A BJT is always reverse biased

The semi-conductor material of the gate in an N-channel JFET is

*p*-type

JFET has higher input impedance than MOSFET

⇒ As regards ∈

_{0}and ∈

_{r}(absolute and relative permittivity)

both ∈

_{0}and ∈

_{r}can be interpreted in terms of atomic properties of medium

only ∈

_{r}can be interpreted in terms of atomic properties of medium

only ∈

_{0}can be interpreted in terms of atomic properties

∈

_{r}has no physical significance

⇒ An op-amp has zero gain for common mode inputs. Then CMRR =

zero

infinite

high

low

⇒ Some desirable features of a computer communication network are

- It should accept an intended transmission without excessive delay
- The data arriving at a receiving point should be processed rapidly
- When a transmission calls for a response, the delay of response should be minimum.

1 and 2 only

1 and 3 only

1, 2, 3

2 and 3 only

⇒

Match the following:

List I (Logic family) | List II (Characteristic) | ||
---|---|---|---|

A. | TTL | 1. | Maximum power consumption |

B. | ECL | 2. | Highest packing density |

C. | NMOS | 3. | Least power consumption |

D. | CMOS | 4. | Saturated Logic |

A-1, B-4, C-2, D-3

A-1, B-4, C-3, D-2

A-4, B-1, C-2, D-3

A-4, B-1, C-3, D-2

⇒ Principle of superposition is applicable to

linear systems only

nonlinear systems only

both linear and non linear system

linear systems and some nonlinear systems

⇒ The braking torque in single phase energy meter is proportional to speed of disc.

TRUE

FALSE

⇒ In a single phase full wave ac regulator the rms value of load current is 20 A load is purely resistive. Then

average thyristor current will be less than 20 A but rms thyristor current will be more than 20 A

both the average and rms thyristor currents will be less than 20 A

both the average and rms thyristor currents will be more than 20 A

rms thyristor current will be 20 A and average thyristor current will be 10 A

⇒

**Assertion (A):** Conductors do not permit propagation of waves more than a short distance into the conductor at microwave frequencies.

**Reason (R):** The relaxation time constant for conductors is much small than the period of centimetric EM wave.

Both (A) and (R) are true and (R) is the correct explanation of (A)

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

(A) is true but (R) is false

(A) is false but (R) is true

⇒ Which one of the following gives maximum probability of error?

ASK

DPSK

FSK

PSK

⇒ Find E at P(1, 1, 1) caused by four identical 3

*n*C point charges located at P

_{1}(1, 1, 0), P

_{2}(- 1, 1, 0), P

_{3}(- 1, - 1, 0) P

_{4}(1, - 1, 0)

21.58

*a*

*+ 21.58*

_{x}*a*

*+ 12*

_{y}*a*

*V/m*

_{z}6.82

*a*

*+ 6.82*

_{x}*a*

*+ 32.89*

_{y}*a*

*V/m*

_{z}-6.82

*a*- 6.82

_{x}*a*- 32.89

_{y}*a*V/m

_{z}-21.58

*a*- 21.58

_{x}*a*- 12

_{y}*az*V/m

⇒ In an R-C circuit, the impedance is 40 Ω at a frequency of 100 Hz. At 200 Hz the impedance should be

40 Ω

80 Ω

20 Ω

more than 20 Ω but less than 40 Ω

⇒ Which of the following is/are not a property/properties power spectral density function S

*x*(ω)?

S

*x*(ω) is real function of ω

S

*x*(ω) is a even function of ω

S

*x*(ω) is non-positive function of ωS

*x*(ω) ≤ 0 for all ω

All of the above

⇒ If a linear time invartant system is exicited by a pure random signal like white noise, the output of the linear system will have which of the following properties?

Output will be a white noise

Output will be periodic

Output will be random

Output will be correlated or coloured noise

⇒ As per temperature limits, the number of categories of solid dielectrics are

7

6

8

5

⇒ Which one of the following is a transferred electron device?

BARITT diode

IMPATT diode

TRAPATT diode

Gunn diode

⇒ In the NMOS inverter

the driver and achieve load are enhancement type

the driver is enhancement type and load depletion type

both driver and load are depletion type

the driver and load are depletion type

⇒ For the system of the given figure, the closed loop poles ar

0 and -4

-2 ±

*j*6

2 ±

*j*6

-3 ±

*j*8