Question

The diagram shows a transverse wave at a particular instant. The wave is trav
to the right. The frequency of the wave is 12.5 Hz.
Q.4
f=1 /
+++++++
distance
Tol
f 12.5
At the instant shown the displacement is zero at point 'P'. What is shortest ti
elapse before the displacement is zero at point 'Q'?
Dio8-oio)
(A) 0.01 s
C) 0.03 s
B) 0.08 s
D) 0.10 s
​

Answer 1

Answer:

A)0.01 seconds

Explanation:

frequency=12.5Hz

time period=1/f

=1/12.5

time period=0.08 sec

now as it os asked on the question the shortest time to displace zero point to be at point Q so its clear from the diagram that if we move zero point from P to Q then it will be the shortest distance so we have to find the time for displacement from point P to Q

from the diagram we can see that 1 wavelength is divided into 8 so time required to travel 1 division will be 1/8 times the total time period so

T'= 1/8 *T.

=0.08/8

=0.01

hope this helps you

Answer 2

Answer:

from the diagram, we can see that 1 wavelength is divided into 8 so the time required to travel 1 division will be 1/8 times

the total period so

T'= 1/8 *T.

=0.08/8

=0.01