60 sin 25 t
60 sin 50 t
84.84 sin 3141
42.42 sin 314 t
Answer is Right!
Answer is Wrong!
The correct answer is $\boxed{\text{B. }60 \sin 50 t}$.
The equation of a sine wave is $y = A \sin(2 \pi f t + \phi)$, where $A$ is the amplitude, $f$ is the frequency, $t$ is time, and $\phi$ is the phase angle.
In this case, the amplitude is $60 \text{ A}$, the frequency is $50 \text{ Hz}$, and the phase angle is $0$. Therefore, the equation of the sine wave is $y = 60 \sin(2 \pi 50 t)$, or $y = 60 \sin 50 t$.
Option A is incorrect because the frequency is $25 \text{ Hz}$, not $50 \text{ Hz}$.
Option C is incorrect because the amplitude is $84.84 \text{ A}$, not $60 \text{ A}$.
Option D is incorrect because the frequency is $314 \text{ Hz}$, not $50 \text{ Hz}$.