A plane wave is represented by E(x,t)=60 , (6 x-1.8 10^ 10 t ) ; V ,m ^ -1

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

Problem

A plane wave is represented by

E(x,t)=60\,\sin\bigl(6\pi x-1.8\times10^{10}\pi t\bigr)\;\text{V\,m}^{-1}.

t = 2.5\times10^{-10}\,\text{s}

, the electric field reaches its maximum positive value at several positions along the

x

-axis. What is the smallest positive value of

x

(in metres) where this occurs? (a)

0.50

(b)

0.17

(c)

0.083

(d)

0.265