(a) the same as the direction of the vibrations of the vibrating body
   (b) at right angles to the direction of the vibrations of the vibrating body
   (c) Both (a) and (b) above
   (d) None of the above
Ans: (a)
201. Sound waves in air are
   (a) transverse
   (b) longitudinal
   (c) transverse and longitudinal
   (d) neither transverse nor longitudinal
Ans: (b)
202. The speed of sound in air at 0° C is approximately
   (a) 4 x 108 m/s
   (b) 1500 m/s
   (c) 330 m/s
   (d) 500 m/s
Ans: (c)
203. Under similar conditions of temperature and pressure, the velocity of
   sound is maximum in
   (a) helium
   (b) argon
   (c) hydrogen
   (d) oxygen
Ans: (c)
204. The characteristics of a musical note are
   (a) loudness
   (b) pitch
   (c) quality or timbre
   (d) All the above
Ans: (d)
205. The ringing of an electric bell in an enclosed evacuated glass bell jar is
   not heard outside because
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