Q20.A sinusoidal wave y(t) = 40 sin(10 × 106πt) is amplitude modulated by another sinusoidal wave x(t) = 20 sin(1000πt). The amplitude of minimum frequency component of modulated signal is (1) 0. 5 (2) 0. 25 (3) 20 (4) 10
What This Question Tests
This question requires identifying the different frequency components in an amplitude modulated signal and calculating the amplitude of the minimum frequency component.
Concepts Tested
Formulas Used
f_c = ω_c / (2π)
f_m = ω_m / (2π)
AM signal frequency components: f_c, f_c + f_m, f_c - f_m
📚 NCERT Sections This Tests
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4.10 Two moving coil meters, M1 and M2 have the following particulars: R1 = 10 Ω, N1 = 30, A1 = 3.6 × 10–3 m2, B1 = 0.25 T R2 = 14 Ω, N2 = 42, A2 = 1.8 × 10–3 m2, B2 = 0.50 T (The spring constants are identical for the two meters). Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M2 and M1.
📋 Question Details
- Chapter
- Communication Systems
- Topic
- Amplitude modulation (AM)
- Year
- 2022
- Shift
- 26 Jun Shift 2
- Q Number
- Q20
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 15: Communication Systems
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