Wideband antenna is

1.  Discone antenna

2.  Folded dipole antenna

3.  both (a) and (B) above

4.  None of these

View Answer  
4
Correct Answer :

None of these


Explanation :
No Explanation available for this question

A t-network is shown in the given figure. Its Y matrix will be (units in Siemens)

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

The antenna which can be used for direction finding is

1.  Half wave dipole

2.   Loop antenna

3.  Broadside antenna array

4.  End fire antenna array

View Answer  
4
Correct Answer :

Loop antenna


Explanation :
No Explanation available for this question

Microwave antennas have

1.   high gain

2.   high front to back ratio

3.  high input impedance

4.  low input impedance

View Answer  
4
Correct Answer :

low input impedance


Explanation :
No Explanation available for this question

The time constant of the network shown in the figure is

1.  CR

2.  2 CR

3.  CR/4

4.  CR/2

View Answer  
4
Correct Answer :

CR


Explanation :
No Explanation available for this question

The current distribution of a half wave dipole is

1.  Uniform

2.  Sinusoidal

3.  Triangular

4.  Complex

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4
Correct Answer :

Sinusoidal


Explanation :
No Explanation available for this question

Tropospheric scatter is used with frequencies in the

1.  HF

2.  VHF

3.   UHF

4.  VLF

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4
Correct Answer :

UHF


Explanation :
No Explanation available for this question

Match the List-I(Parameters)with List-II(Units)and select the correct answer using the codes given below the lists List-I List-II A. h11 1.Dimensionless B. h12 2.Ohms C. h22 3.Siemens

1.   A B C 1 2 1

2.   A B C 1 3 2

3.   A B C 2 1 3

4.   A B C 1 2 3

View Answer  
4
Correct Answer :

A

B

C

2

1

3

Explanation :
No Explanation available for this question

An RLC resonant circuit has a resonance frequency of 1.5 MHz and a bandwidth of 10 kHz. If C = 150 Pf, then the effective resistance of the circuit will be

1.  29. 5 Ω

2.  14.75 Ω

3.   9.5 Ω

4.  4.7 Ω

View Answer  
4
Correct Answer :

4.7 Ω


Explanation :
No Explanation available for this question

The current through an electrical conductor is 1 ampere when the temperature of the conductor is 00 and 0.7 ampere when the temperature is 1000 C. The current when the temperature of the conductor is 12000 C must be

1.  0.08 A

2.  0.16 A

3.  0.32 A

4.  0.64 A

View Answer  
4
Correct Answer :

0.16 A


Explanation :
No Explanation available for this question
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