Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

10 Questions

2 Views

Modulation and Carrier Waves

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What happens when the amplitude sensitivity ka of the modulator is large enough to make |ka m(t)| >1 for any t?

The carrier wave disappears

The carrier wave becomes under-modulated

The carrier wave remains the same

The carrier wave becomes over-modulated (correct)

What is the unit of measurement for the carrier amplitude Ac and the message signal m(t)?

Watts

Amps

Volts (correct)

What is the condition for the envelope to have the same shape as the message signal m(t)?

The amplitude of ka m(t) is always equal to unity

The amplitude of ka m(t) is always greater than unity

The amplitude of ka m(t) is always less than unity (correct)

The amplitude of ka m(t) is randomly varying

What is the term for the absolute maximum value of ka m(t) multiplied by 100?

Percentage modulation Signup and view all the answers

What is the condition for the carrier frequency in relation to the message signal bandwidth?

The carrier frequency is much greater than the message bandwidth Signup and view all the answers

What happens when the carrier frequency is not much greater than the highest frequency component W of the message signal?

An envelope cannot be visualized satisfactorily Signup and view all the answers

What is the purpose of amplitude modulation?

To transmit information pertaining to the message signal m(t) Signup and view all the answers

What is the term for the amplitude of the modulated wave s(t)?

Envelope Signup and view all the answers

What is the consequence of over-modulation?

Envelope distortion Signup and view all the answers

What is the relationship between the amplitude of ka m(t) and unity in amplitude modulation?

The amplitude of ka m(t) is always less than unity Signup and view all the answers