Page 1 - WORKSHEET - 1 CH 15 CLASS XI

PHYSICS CLASS-11 CHAPTER 15(WAVES)

WORKSHEET -1(PROGRESSIVE WAVES)

1 The velocity of sound is maximum in (AFMC Pune 98)
(a) Water
(b) Air
(c) Vacuum
(d) Metal

2 A wave is represented by the equation

y  A sin (10x  15t  ), where x is in meters and t is in seconds. The expression
3
represents (IIT-90)
(a) A wave traveling in the positive x-direction with a velocity 1.5 m/s
(b) A wave traveling the negative x-direction with a velocity 1.5 m/s
(c) A wave traveling in the negative x-direction have a wave-length 0.2 m
(d) Both ‘b’ and ‘c’

3 The relation between frequency n, wavelength  and velocity  of a wave is (CPMT 76, 85)
(a) n  
(b)   n

(c)

(d)

4 in the longitudinal waves the direction of vibration in medium of particle is (MHT-CET 2005)
(a) Perpendicular to propagation of wave
(b) Parallel to propagation
(c) Different from each other
(d) Variable for time to time.

5 The equation of wave traveling along string is y  3 cos  (100t  x) in C.G.S. unit then
wavelength is
(CPMT-91, MPPMT-94,97, MNR-85)
(a) 1 m
(b) 2 cm
(c) 5 cm
(d) None of above

6 A sound wave is represented by
y  a sin (1000t  3x). the distance between two points having a phase difference of 60 is
(MHT CET 2003)

(a)

(b)

(c)