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JEE Main20208 Jan 2020Evening ShiftPhysicsWaves and SoundActual

A transverse wave travels on a taut steel wire with a velocity of v when tension in it is 2.06 × 10 4 N . When the tension is changed to T , the velocity changed to v 2 . The value of T is close to:

Options

  1. A2.50 × 10 4 N
  2. B5.15 × 10 3 N
  3. C30.5 × 10 4 N
  4. D10.2 × 10 2 N

Correct answer

B. 5.15 × 10 3 N

Step-by-step solution

v ∝ T ⇒ v 1 v 2 = T 1 T 2 ⇒ v v 2 = 2.06 × 10 4 T ⇒ T = 2.06 × 10 4 4 N = 0.515 × 10 4 N

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