Question

The figure shows, at time $t=0\text{second}$, a rectangular and triangular pulse on a uniform wire, approaching each other. The pulse speed (of rectangular and triangular pulse) is $0.5\text{cm/s}$. The resultant pulse at $t=2\text{second}$ is,

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

At $t=2\text{second}$, each pulse travels by $s=vt=0.5\left(2\right)=1\text{cm}$
The position of both pulses are separately shown in fig(a) and fig (b) and the superposition of both pulses is shown in fig(c).

Hence, $\left(D\right)$ is the correct answer.