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JEE Main Physics Class 12 Alternating Currents Part 2 Questions
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© examsnet.com
Question : 40
Total: 75
A sinusoidal carrier voltage is amplitude modulated. The resultant amplitude modulated wave has maximum and minimum amplitude of
120
V
and
80
V
respectively. The amplitude of each sideband is :
[30-Jan-2023 Shift 1]
15
V
10
V
20
V
5
V
Validate
Solution:
A
c
+
A
m
=
120
A
c
−
A
m
=
80
∴
A
c
=
100
A
m
=
20
Modulation index
=
20
100
=
1
5
Amplitude of each sideband
=
A
c
(mod ulation index)
2
=
100
×
1
10
=
10
volt
© examsnet.com
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