Mcqs in Wave propagation

1. A 'skip zone' is:
   1. the distance between the antenna and where the refracted wave first returns to earth
   2. the distance between the far end of the ground wave and where the refracted wave first returns to earth
   3. the distance between any two refracted waves
   4. a zone caused by lost sky waves
2. The medium which reflects high frequency radio waves back to the earth's surface is called the:
   1. biosphere
   2. stratosphere
   3. ionosphere
   4. troposphere
3. The highest frequency that will be reflected back to the earth at any given time is known as the:
   1. UHF
   2. MUF
   3. OWF
   4. LUF Continue reading Mcqs in Wave propagation →

• 10 kW
• 15 kW
• 7.5 kW

2. Adaptive pre-emphasis in FM limiter is

• Independent of frequency.
• Dependent on frequency.
• Independent of level.
• Dependent on level.

3. The feeder used to connect the FM Transmitter to the antenna is

• Co-axial cable.
• 2-wire shielded cable.
• Twin flat cable.
• None of the above. Continue reading MCQs in Radio Engineering Part -1 →

EC Engineering MCQs​

Electronics and Communication Engineering  Test Paper

Choose the correct answer

1. The output power of an audio power amplifier is 12 W, which is approximately

a) 20 dBm                   b) 41 dBm                   c) 62 dBm                   d) 86 dBm

2. The bandwidth of a wide-band amplifier to reproduce a pulse faithfully depends on

a) Width of the pulse                                       b) Rise time of the pulse        
c) Frequency of the pulse                               d) All of these

Continue reading EC Engineering MCQs Paper 2 →