Q)
(chatquestion)...(D) F and P
(C) G and F
MATCH LIST TYPE
This question contains two matching lists. Choices for the correct combination of elements from Lista e
List-ll are given as option (A), (B), (C) and (D) out of which one is correct.
Two identical speakers emit sound waves of frequency 680 Hz uniformly in all directions with a
total output of 1mW each. The speed of sound in air is 340 m/s. A point P is at a distance 2m
from one speaker and 3m from the other. Match the following.
List - II
List - I
The intensity due to a speaker at point P which is 2 m
(P)
5.6 x 10 W/m?
(1)
from the source
If the speakers are driven coherently and in phase, the
(Q)
intensity at point P will be due to both speakers
2.2x 106 W/m2
(2)
If they are driven coherently but out of phase by 180°,
(R)
the intensity at point P will be due to both speakers
2.9 x 10 W/m?
(3)
If the speakers are incoherent, the intensity at point P
(S)
will be due to both speakers
2 x 105 w/m2
(4)
Codes:
4
3
(A)
(B)
4.
4.
3.
St231
P234 2
...
