A wave on a string has amplitude

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

3\,\text{cm}

, wavelength

40\,\text{cm}

and frequency

25\,\text{Hz}

. It travels along the

+x

-axis, and the displacement at the origin is zero at

t=0

. Which one of the following equations (in SI units) describes the wave? (a)

y = 0.03\,\sin(5\pi x + 50\pi t)

(b)

y = 0.03\,\sin(10\pi x - 50\pi t)

(c)

y = 0.03\,\sin(5\pi x - 50\pi t)

(d)

y = 0.03\,\sin(5\pi x - 25\pi t)