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Q1. | Which of the following is best excited from a waveguide? |

A. | Discone [Wrong Answer] |

B. | Helical [Wrong Answer] |

C. | Biconical [Wrong Answer] |

D. | Horn [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss 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 pole zero diagram of an impedance Z has a pole at

*s*= - 6 and zero at

*s*= - 4 as shown in figure the constant multiplier

*k*= 1. For a signal I

_{s}= cos 6

*t*, the steady state voltage across Z is given in magnitude as u

0.6

0.84

7.2

none

⇒ Basically a potentiometer is a device for

comparing two votage

measuring a voltage

comparing two currents

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⇒ Which of these is the most recent display device?

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VF

(a) and (c)

⇒ In a discharging R-L circuit voltage across the resistor exhibits

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a linear decay

an exponential growth function

an exponential decay function

⇒ In a single phase full wave ac regulator, the firing angles in the two half cycles

are always equal

are sometimes equal

are never equal

may be equal or unequal

⇒ Above ferroelectric curie temperature, spontaneous polarization in ferroelectric materials becomes stronger.

TRUE

FALSE

⇒ In ASCII, letter B is coded as

1000001

1000010

100100

1001000

⇒ When .9432 E - 4 is subtracted from .5452 E - 3 in normalized floating point mode

none of the numbers is changed

.9432 E - 4 is changed to .09432 E - 3 and .5452 E - 3 is not changed

.5452 E - 3 is changed to 5.452 E - 4 but .9432 E - 4 is not changed

both Ihe numbers are changed and their exponents are, made equal to -5

⇒ In a 5.6 ohms, ± 10% carbon composition resistor, the colour of the third strip from extreme left is

golden

silver

green

black

⇒ A voltage v = 5 + 50 sin ω

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*t*+ 0.00785 cos 1570

*t*

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*t*+ 0.00785 cos 1570 t

0.0157 sin 314

*t*+ 0.00785 sin 1570

*t*

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*t*/ + 45°) + 0.00785 sin (1570

*t*+ 45°)

⇒ Consider the resonant circuit as shown b

R = 10

^{4}L = 5 μH C = 20 pF

1000 L = 50 μH C = 200 pF

10 K L = 50 μH C =20 pF

None of these

⇒ The effect of the inductance of a coil on a constant direct current is that

it does not effect the constant direct current

it decreases the current

it strengthens the current

it causes a higher voltage drop

⇒ In an ac single phase energy meter, the potential coil is put on

both side limbs, of upper magnet

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one side limb of upper magnet

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⇒ The autocorrelation function of the white noise is

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step function

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⇒ The V

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⇒ Which of the following element does not have three valence electrons?

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⇒ A 50 p characteristic impedance line is connected to a load which shows a reflection coefficients of 0.268. If V

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0.139 W

1.39 W

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⇒ The two outputs of RS flip-flop are

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always high

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always complementary

⇒ In a specimen of

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*p*

_{no}and

*n*

_{no}. When the specimen is subjected to radiation, the hole and electron concentration increase to

*p*

_{n}and

*n*

_{n}. Then

*p*

_{n}-

*p*

_{no}=

*n*

_{n}-

*n*

_{no}

*p*

_{n}+

*p*

_{no}=

*n*

_{n}+

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_{no}

*p*

_{n}-

*p*

_{no}=

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_{no}+

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_{no}

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_{no}

⇒ For an amplifier the input output signals are shown in figure. The class of amplifie

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⇒ In case of surface waves the field strength at a point is directly proportional to

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⇒ In a stop-and-wait ARQ system, the transmitting terminal

waits for positive or negative acknowled-gement from the receiving terminal after sending a block

sends another block if positive acknowledge is received through ACK character

resends the previous block if negative acknowledgement is received through a NAK character

does not wait for acknowledgement after sending a block

⇒ Consider the following statements about hybrid ring

- Ports 1 and 2 are decoupled.
- Port 3 and 4 are coupled.
- A signal entering either port 1 or 2 splits equally between ports 3 and 4.
- A signal entering either port 3 or 4 splits equally between ports 1 and 2.

1, 2, 3 and 4

1, 3 and 4

1 and 2

2, 3 and 4

⇒ The resistivity of a semiconductor

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decreases as the temperature increases

remains constant even when temperature varies

none of the above

⇒ For a photoengraving the mask used is

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slave mask

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⇒ When P-N junction is in forward bias, by increasing the battery voltage

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current through P-N junction increases

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none of the above

⇒

Match the following:

List I (F.T and F.S) | List II (Properties) | ||
---|---|---|---|

A. | Fourier Series | 1. | Discrete, Periodic |

B. | Fourier Transform | 2. | Continuous, Periodic |

C. | Discrete Time Fourier | 3. | Discrete aperiodic |

D. | Discrete Fourier Transform | 4. | Continuous, aperiodic |

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

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

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

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

⇒ It is desired to evaluate the expression

`F = B * COS (Y) + C * SQR (COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

`F = B * COS (Y) + C * SQR [COS (Y)] + A * COS (Y) * SQR [COS (Y)]`

`F = B * COS (Y) + C * COS(Y) * COS (Y) + A * COS (Y) * COS (Y) * COS (Y)`

` X = COS(Y)`

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