1
AIPMT 2001
+4
-1
The equation of a wave is represented by

y $$=$$ 10$$-$$4 sin(100t $$-$$ $${x \over {10}}$$) m. then the velocity of wave will be
A
100 m/s
B
4 m/s
C
1000 m/s
D
10 m/s
2
AIPMT 2001
+4
-1
If the tension and diameter of a sonometer wire of fundamental frequency n is doubled and density is halved then its fundamental frequency will become
A
$${\pi \over 4}$$
B
$$\sqrt 2 n$$
C
n
D
$${n \over {\sqrt 2 }}$$
3
AIPMT 2000
+4
-1
The equations of two waves acting in perpendicular directions are given as
x = $$a$$cos($$\omega$$t +$$\delta$$) and y = $$a$$cos($$\omega$$t + $$\alpha$$), where $$\delta$$ = $$\alpha$$ + $${\pi \over 2}$$, the resultant wave represents
A
a parabola
B
a circle
C
an ellipse
D
a straight line
4
AIPMT 2000
+4
-1
Out of Syllabus
Two stationary sources each emitting waves of wavelength $$\lambda$$, an observer moves from one source to another with velovcity u. Then number of beats heard by him
A
$${{2u} \over \lambda }$$
B
$${u \over \lambda }$$
C
$$\sqrt {u\lambda }$$
D
$${u \over {2\lambda }}$$
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