- A. Is the same as that of dipole
- B. Is less than that of dipole
- C. Is more than that of dipole
- D. May be equal, more or less than that of dipole
In a TV receiver antenna the length of reflector rod_____.
A cordless telephone using separate frequencies for transmission in base and portable units is known as_____.
- A. Duplex arrangement
- B. Half duplex arrangement
- C. Either A or B
- D. Neither A nor B
A modem is classified as low speed if data rate handled is_____.
- A. Upto 100 bps
- B. Upto 250 bps
- C. Upto 400 bps
- D. Upto 600 bps
A telephone channel requires a bandwidth of about_____.
- A. 1 kHz
- B. 3 kHz
- C. 10 kHz
- D. 50 kHz
In a FM receiver, amplitude limiter_____.
- A. Amplifiers low frequency signals
- B. Reduces the amplitude of signals
- C. Eliminates any change in amplitude of received FM signals
- D. None of the above
An audio signal (say from 50 Hz to 10000 Hz) is frequency translated by a carrier having a frequency of 106 Hz. The values of initial (without frequency translation) and final (after frequency translation) fractional change in frequency from one band edge to the other are_____.
- A. 200 and 1.01
- B. 200 and 10.01
- C. 200 and 100.1
- D. 200 and 200
Skip distance depends on time of day and angle of incidence.
- A. True
- B. False
For telegraphy the most commonly used modulation system is_____.
- A. FSK
- B. Two tone modulation
- C. PCM
- D. Single tone modulation
The frequency range of 300 kHz to 3000 kHz is known as_____.
- A. Low frequency
- B. Medium frequency
- C. High frequency
- D. Very high frequency
For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as_____.
- A. 2E
- B. 3E
- C. 4E
- D. 6E