# A string of length 1 m and mass 5 g is fixed at both ends. The tension in the string is 8.0 N. The siring is set into vibration using an external vibrator of frequency 100 Hz. The separation between successive nodes on the string is close to : (a) 16.6 cm (b) 20.0 cm (c) 10.0 cm (d) 33.3 cm

## Question ID - 50240 :- A string of length 1 m and mass 5 g is fixed at both ends. The tension in the string is 8.0 N. The siring is set into vibration using an external vibrator of frequency 100 Hz. The separation between successive nodes on the string is close to : (a) 16.6 cm (b) 20.0 cm (c) 10.0 cm (d) 33.3 cm

3537

Velocity of wave on string

V= = =40m/s

Now, wavelength of wave = = m

Separation between successive nodes, = m

=20 cm

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 A train moves towards a stationery observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is . If the speed of the train is reduced to 17 m/s, the frequency registered is .if speed of sound is 340 m/s, then the ratio  is : (a) 18/17 (b) 19/18 (c) 20/19 (d) 21/20