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Q1. | A long periodic antenna is a |

A. | frequency independent antenna [Correct Answer] |

B. | frequency dependent antenna [Wrong Answer] |

C. | directional antenna [Wrong Answer] |

D. | none of the above [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 :**

⇒ In the given figure forward current wave has a magnitud

0.45 A

0.3 A

0.2 A

0.1 A

⇒ The temperature coefficient of copper is 0.00393 at 20° C. At 50° C the temperature coefficient is

0.0042

0.0035

0.0025

0.0015

⇒

Match the following:

List I | List II | ||
---|---|---|---|

A. | CTFS | 1. | Periodic |

B. | DTFS | 2. | Non-periodic |

C. | CTFT | ||

D. | DTFT |

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

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

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

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

⇒ Huffman code is also known as redundancy code

TRUE

FALSE

in some cases

depend upon efficiency

⇒ Which of the following statement regarding waveguides is

*incorrect*?

At waveguide can be coupled to a coaxial cable

At frequencies below the cut off value the wave progresses across the waveguide after total reflections

Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves

Waveguides can handle large power at UHF and microwaves

⇒ For an op-amp source follower circuit

input and output voltages have same magnitude

output and input voltages are in phase

output and input voltages are in phase but have different magnitudes

output and input voltages have same magnitude and are in phase

⇒ In the following transistor circuit

*V*

_{BE}= 0. 7 V,

*r*= 25mV/I

_{c}_{E}, and β and the capacitance are very l

1 mA

2 mA

5 mA

10 mA

⇒ A point charge of 6 μC is located at the origin, uniform line charge density of 180

*n*C/

*m*of 8

*m*length lies along the

*x*axis and a uniform sheet of charge equal to 25

*n*C/

*m*

^{2}of area p x 4

^{2}lies in the

*z*= 0 plane. Calculate total electric flux leaving the surface of sphere of 4

*m*radius centered at origin.

86.97 μC

8.697

*n*C

8.697 μC

86.97

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⇒ Given below a block diagram of oscillator circuit with various reactance elemen

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= C

*x*

_{1}= C,

*x*

_{2}= L,

*x*

_{3}= L

*x*

_{1}= C,

*x*

_{2}= C,

*x*

_{3}= L

*x*

_{1}= L,

*x*

_{2}= C,

*x*

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⇒ A plane EM wave is travelling in an unbound loss less dielectric having μ

_{y}= 1 and ε

_{y}= 4, the time average Poynting vector of the wave is 5 W/m

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^{8}m/sec) is

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⇒ The initial contents of

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- ACC = 10000001

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0 and 00000011

1 and 00000001

0 and 00000001

⇒ When a

*p*-

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TRUE

FALSE

⇒ For the system with given characteristic equat

3, 2, 0

4, 0, 1

3, 0, 2

4, 1, 0

⇒ In metals, the average drift velocity of electron per unit field is called mobility.

TRUE

FALSE

⇒ Due to which of the following reasons a lightning conductor on top of a building is made into a pointed spike?

Dust particles may not accumulate

Charge per unit area becomes very high for lightening to discharge

Rain drops may not collect

None of the above

⇒ In most transistor the collector region is made physically larger than the emitter region

for dissipating heat

to distinguish it from other regions

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to reduce resistance in the path of flow of electrons

⇒ A parallel plate capacitor having C = 200 x 10

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^{6}Hz and peak value 2 V, the dielectric losses are

10

^{-8}W

10

^{-6}W

10

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10

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⇒ A full wave bridge rectifier is supplied voltage at 50 Hz. The lowest ripple frequency will be

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200 Hz

100 Hz

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⇒ A copper specimen has resistivity equal to 1.8 x 10

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3 x 10

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6 x 10

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⇒ For the polynomial

*P*(

*s*) =

*s*

^{5}+

*s*

^{4}+ 2

*s*

^{3}+ 2

*s*

^{2}+ 3

*s*+ 15 The number of roots which lie in the right half of the

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4

2

3

1

⇒ Class C operation finds application in

RF power amplifiers

frequency multipliers

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⇒ The reverse saturation current in a semiconductor diode consists of

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zener current

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minority carrier current and surface leakage current

⇒ Antenna beamwidth is

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measure of angle

measure of radiation pattern

measure of power pattern

⇒ The circuit given bel

Circuit is band stop with two edge frequency of 39.7875 Hz to 1592 Hz

Circuit is band pass with two edge frequency of 39.7875 Hz to 1592 Hz

Circuit is oscillator, oscillation at two frequencies 39.7875 Hz to 1592 Hz depending on R

_{3}, R

_{4}, R

_{5}and R

_{6}

None of these

⇒ The diameter of an atom is

10

^{-6}metre

10

^{-10}metre

10

^{-15}metre

10

^{-21}metre

⇒ The number of valence electrons in donor impurity are

5

4

3

1

⇒ Yettrium-iron garnet (Y

_{2}Fe

_{5}O

_{12}) is a soft magnetic material suitable for applications involving

dc

50 Hz ac

ac of a few K Hz

ac of a few hundred MHz

⇒ An 8156 has A

_{15}connected to its CE input. A

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_{7}to AC

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80 H

85 H

82 H, 83 H

80 H to 85 H

⇒ Consider the following statements about polar plots

- Addition of a non-zero pole to a transfer function results in further rotation of polar plot through an angle of - 90° as ω → ∞
- Addition of a pole at the origin to a transfer function rotates the polar plot at zero and infinite frequencies by a further angle of - 90°

Both are correct

Both are wrong

1 is correct and 2 is wrong

2 is correct and 1 is wrong

⇒ In a CRO, the frequency of output of time base generator

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is adjustable

varies automatically

either (a) or (c)