Answer :
The amplitude of the waveform is 25 and the frequency is 118.5 Hz, therefore the correct choice is option (C).
1. Given waveform:
v(t) = 25sin(744t).
2. Amplitude (A) = coefficient of the sine function = 25.
3. Frequency (f) can be determined from the angular frequency (ω) using the formula:
f = ω / (2π).
4. Comparing with the given waveform,
ω = 744.
5. Substitute ω into the formula:
f = 744 / (2π).
6. Calculate:
f ≈ 744 / (2 * 3.14) ≈ 744 / 6.28 ≈ 118.5 Hz.
7. Therefore, the amplitude is 25 and the frequency is approximately 118.5 Hz. Option C is correct.
