1
AIPMT 2006
+4
-1
Which one of the following statements is true ?
A
both light and sound waves can travel in vaccum
B
both light and sound waves in air are transverse
C
The second waves in air are longitudinal while the light waves are transverse
D
both light and sound waves in air are
2
AIPMT 2005
+4
-1
A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distances of 2 m and 3 m respectively from the source. The ratio of the intensities of the waves at P and Q is
A
3 : 2
B
2 : 3
C
9 : 4
D
4 : 9
3
AIPMT 2004
+4
-1
Out of Syllabus
A car is moving towards a high cliff. The driver sounds a horn of frequency $$f$$. The reflected sound heard by the driver has frequency $$2f$$. If v is the velocity of sound, then the velocity of the car, in the same velocity units, will be
A
v/$$\sqrt 2$$
B
v/3
C
v/4
D
v/2
4
AIPMT 2004
+4
-1
The phase difference between two waves. represented by
y1 = 10$$-$$6 sin[100t + (x/50) + 0.5] m
y2 = 10$$-$$6 cos[100t + (x/50)] m,
where x is expressed in metres and t is exressed in secondss, is approximately.
A
B
C
D