This set of Analog Communications Multiple Choice Questions & Answers (MCQs) focuses on “Problems of DSBSC”.
1. A Marconi antenna has length equal to ________
Explanation: Marconi antenna is like a vertical wire having length one fourth of the working wavelength. It requires a ground plane with very good conductivity.
2. In a Vidicon camera tube, both sides of the target plate have the coating of antimony tri-sulphide.
Explanation: In a Vidicon camera tube, the side of target plate facing the light has a coating of Sno2 and the side facing electron gun has a coating of antimony trisulphide.
3. A trigonometric function is a synonym of ________
a) triangular function
b) orthogonal function
c) singular function
d) rectangular function
Explanation: Trigonometric function is the angle expressed as the ratio of two sides of a triangle that contains the angle. It can also be seen as a synonym of triangular function.
4. White noise is a synonym of ________
a) Atmospheric noise
b) shot noise
c) johnson noise
d) transit time noise
Explanation: White noise is a type of internal noise in communication. It can also be called thermal noise or johnson noise.
5. Local programmes in a cable TV can be telecast at any frequency.
Explanation: There is not a fixed frequency range for broadcasting of local programmes in a cable TV. It can be telecast at any frequency.
Explanation: Minimum resolution of human eye for clear observation is generally . The diameter of human eye is about 25mm.
7. Power density spectrum of a resistor R can be expressed as ________
a) 2 kTR
b) 1 kTR
c) 0.75 kTR
d) 3 kTR
Explanation: The Power density spectrum of a resistor R can be expressed as 2 kTR where k is Boltzmann’s constant, T is Temperature and R is given resistance.
8. VSB is generally used in ________
a) television production
b) radio transmission
c) telephonic conversations
d) long distance conversations
Explanation: Vestigial Side Band (VSB) is generally used in television production because it reduces the required bandwidth to half.
9. A helical antenna is used for satellite tracking due to its __________
a) broad bandwidth
b) circular polarization
c) linear polarization
d) good front to back ratio
Explanation: Helical antenna consists conducting wire. These conducting wire is wound around it in the form of helix. It is mainly used for satellite tracking due to its good front to back ratio.
10. What is the typical bandwidth of a 2-wire telephone line?
a) 20 Hz to 6 KHz
b) 300 Hz to 3.4 KHz
c) 20 Hz to 20 KHz
d) 200 Hz to 6.5 KHz
Explanation: The bandwidth of a 2-wire telephone line is fixed in a particular range. Its range generally varies between 300 Hz to 3.4 KHz.
Sanfoundry Global Education & Learning Series – Analog Communications.
To practice all areas of Analog Communications, here is complete set of 1000+ Multiple Choice Questions and Answers.