Q20.In the case of amplitude modulation to avoid distortion the modulation index ๐ should be : (1) ๐โค1 (2) ๐โฅ1 (3) ๐= 2 (4) ๐= 0
What This Question Tests
This question assesses the fundamental condition for avoiding distortion in amplitude modulation. It directly tests the knowledge of the modulation index and its permissible range for clear signal reception.
Concepts Tested
๐ NCERT Sections This Tests
14.2 โ Which Of The Statements Given In Exercise 14.1 Is True For P-Type
Physics Class 12 ยท Chapter 14
14.2 Which of the statements given in Exercise 14.1 is true for p-type semiconductos.
2.10 โ Dielectrics And Polarisation
Physics Class 11 ยท Chapter 2
2.10 DIELECTRICS AND POLARISATION Dielectrics are non-conducting substances. In contrast to conductors, they have no (or negligible number of ) charge carriers. Recall from Section
14.1 โ In An N-Type Silicon, Which Of The Following Statement Is True:
Physics Class 12 ยท Chapter 14
14.1 In an n-type silicon, which of the following statement is true: (a) Electrons are majority carriers and trivalent atoms are the dopants. (b) Electrons are minority carriers and pentavalent atoms are the dopants. (c) Holes are minority carriers and pentavalent atoms are the dopants. (d) Holes are majority carriers and trivalent atoms are the dopants.
๐ Question Details
- Chapter
- Communication Systems
- Topic
- Amplitude Modulation
- Year
- 2022
- Shift
- 28 Jul Shift 1
- Q Number
- Q20
- Type
- Conceptual
- NCERT Ref
- Class 12 Physics Ch 15: Communication Systems
More from this Chapter
Q78.Consider telecommunication through optical fibres. Which of the following statements is not true? (1) Optical fibres can be of graded refractive index (2) Optical fibres are subjective to electromagnetic interference from outside (3) Optical fibres have extremely low transmission (4) Optical fibres may have homogeneous core with loss a suitable cladding.
Q29.This question has Statement โ1 and Statement โ2. Of the four choices given after the statements, choose the one that best describes the two statements. Statement-1 : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals. Statement-2 : The state of ionosphere varies from hour to hour, day to day and season to season. (1) Statement-1 is true, Statement-2 is true; (2) Statement-1 is true, Statement-2 is true; Statement-2 is the correct explanation of Statement-2 is not the correct explanation of Statement-1. Statement-1. (3) Statement- 1 is false, Statement- 2 is true. (4) Statement-1 is true, Statement-2 is false. JEE Main 2011 JEE Main Previous Year Paper
Q30.Broadcasting antennas are generally (1) vertical type (2) both vertical and horizontal type (3) omni directional type (4) horizontal type
Q29.Given the electric field of a complete amplitude modulated wave as Em โE = ^iEc + cos cos ฯct (1 Ec ฯmt) Where the subscript c stands for the carrier wave and m for the modulating signal. The frequencies present in the modulated wave are (1) ฯc and โฯ2c + ฯ2m (2) ฯc, ฯc + ฯm and ฯc โฯm (3) ฯc and ฯm (4) ฯc and โฯcฯm