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Waves question

2019 · 9 Jan · Shift 1 · Q61
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Waves question

2019 · 9 Jan · Shift 1 · Q61

JEE MainPhysicsWavesMCQ+4 / −1
A heavy ball of mass M is suspendeed from the ceiling of a car by a light string of mass m (m < < M). When the car is at rest, the speed of transverse waves in the string is 60 ms −-− 1. When the car has acceleration a, the wave-speed increases to 60.5 ms −-− 1. The value of a, in terms of gravitational acceleration g, is closest to :
  1. A
    g30{g \over {30}}30g​
  2. B
    g5{g \over 5}5g​
  3. C
    g10{g \over 10}10g​
  4. D
    g20{g \over 20}20g​
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