Electromagnetism
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Alternating Current
MCQ (Single Correct Answer)
Modern Physics
Dual Nature of Radiation
MCQ (Single Correct Answer)
Semiconductor Devices and Logic Gates
MCQ (Single Correct Answer)
Communication Systems
MCQ (Single Correct Answer)
1
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In amplitude modulation, the amplitude of carrier wave is $A_c$ and that of the modulating signal is $A_m$. In practice, the ratio of $A_m$ to $A_c$ is kept less than or equal to one, to avoid

A
distortion
B
attenuation
C
fading
D
noise
2
MHT CET 2019 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In frequency modulated wave

A
frequency varies with time
B
both frequency and amplitude vary with time
C
amplitude varies with time
D
both frequency and amplitude are constant
3
MHT CET 2019 2nd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A layer of atmosphere that reflects medium frequency radio waves which is ineffective during night, is

A
F-layer
B
E-layer
C
stratosphere
D
thermosphere
MHT CET Subjects