Question
Physics Question on Wave characteristics
Amplitude modulated wave is represented by VAM = 10[1+0.4cos(2π×104t] cos(2π×107t). The total bandwidth of the amplitude modulated wave is:
A
10 kHz
B
20 MHz
C
20 kHz
D
10 MHz
Answer
20 kHz
Explanation
Solution
Bandwidth = 2 × fm = 2 × 104 Hz = 20 kHz
so, correct option is (B) 20MHz