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Chapters
2: Electrostatic Potential and Capacitance
3: Current Electricity
4: Moving Charges and Magnetism
5: Magnetism and Matter
6: Electromagnetic Induction
7: Alternating Current
8: Electromagnetic Waves
9: Ray Optics and Optical Instruments
10: Wave Optics
11: Dual Nature of Radiation and Matter
12: Atoms
13: Nuclei
14: Semiconductor Electronics: Materials, Devices and Simple Circuits
▶ 15: Communication Systems
![NCERT solutions for Physics [English] Class 12 chapter 15 - Communication Systems - Shaalaa.com](/images/9788174506313-physics-english-class-12_6:cdb96651cad74f93ac9629abf3654ecd.jpg "NCERT solutions for Physics [English] Class 12 chapter 15 - Communication Systems")
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Solutions for Chapter 15: Communication Systems
Below listed, you can find solutions for Chapter 15 of CBSE, Karnataka Board PUC NCERT for Physics [English] Class 12.
NCERT solutions for Physics [English] Class 12 15 Communication Systems Exercise [Pages 530 - 531]
Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?
(a) 10 kHz
(b) 10 MHz
(c) 1 GHz
(d) 1000 GHz
Frequencies in the UHF range normally propagate by means of:
(a) Ground waves.
(b) Sky waves.
(c) Surface waves.
(d) Space waves.
Digital signals
(i) Do not provide a continuous set of values,
(ii) Represent values as discrete steps,
(iii) Can utilize binary system, and
(iv) Can utilize decimal as well as binary systems.
Which of the above statements are true?
(a) (i) and (ii) only
(b) (ii) and (iii) only
(c) (i), (ii) and (iii) but not (iv)
(d) All of (i), (ii), (iii) and (iv).
Is it necessary for a transmitting antenna to be at the same height as that of the receiving antenna for line-of-sight communication? A TV transmitting antenna is 81m tall. How much service area can it cover if the receiving antenna is at the ground level?
A carrier wave of peak voltage 12 V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 75%?
A modulating signal is a square wave, as shown
The carrier wave is given by `c(t) = 2 sin (8pit) "volts"`
(i) Sketch the amplitude modulated waveform
(ii) What is the modulation index?
For an amplitude modulated wave, the maximum amplitude is found to be 10 V while the minimum amplitude is found to be 2 V. Determine the modulation index μ. What would be the value of μ if the minimum amplitude is zero volt?
Due to economic reasons, only the upper sideband of an AM wave is transmitted, but at the receiving station, there is a facility for generating the carrier. Show that if a device is available which can multiply two signals, then it is possible to recover the modulating signal at the receiver station.
Solutions for 15: Communication Systems
NCERT solutions for Physics [English] Class 12 chapter 15 - Communication Systems
Shaalaa.com has the CBSE, Karnataka Board PUC Mathematics Physics [English] Class 12 CBSE, Karnataka Board PUC solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT solutions for Mathematics Physics [English] Class 12 CBSE, Karnataka Board PUC 15 (Communication Systems) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Physics [English] Class 12 chapter 15 Communication Systems are Detection of Amplitude Modulated Wave, Production of Amplitude Modulated Wave, Basic Terminology Used in Electronic Communication Systems, Sinusoidal Waves, Modulation and Its Necessity, Amplitude Modulation (AM), Need for Modulation and Demodulation, Satellite Communication, Propagation of Electromagnetic Waves, Bandwidth of Transmission Medium, Bandwidth of Signals, Elements of a Communication System.
Using NCERT Physics [English] Class 12 solutions Communication Systems exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in NCERT Solutions are essential questions that can be asked in the final exam. Maximum CBSE, Karnataka Board PUC Physics [English] Class 12 students prefer NCERT Textbook Solutions to score more in exams.
Get the free view of Chapter 15, Communication Systems Physics [English] Class 12 additional questions for Mathematics Physics [English] Class 12 CBSE, Karnataka Board PUC, and you can use Shaalaa.com to keep it handy for your exam preparation.
