Question

30. The accurace of a clock is one part in 100. The
maximum difference between two such clocks
operating for 101° second is:
a. 1s
b 5s
c.10s
d.1010s​

Answer 1

Explanation:

When two waves of same frequencies meet at a point with no phase difference, then the resultant amplitude is the sum of the individual ones.

Intensity is proportional to the square of the amplitude.

Hence I

0

=kA

1

2

and 4I

0

=kA

2

2

where k is the constant of proportionality.

Hence A

1

=

k

−1

I

0

and A

2

=2

k

−1

I

0

Resultant amplitude is A

R

=A

1

+A

2

=3

k

−1

I

0

Resultant intensity 9I

0