Navigate

Sound waves travel at 350m/s through a warm air and at 3500 m/s through brass

Sound waves travel at 350m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air

Options

(a) decreases by a factor 10
(b) increases by a factor 20
(c) decreases by a factor 20
(d) increases by a factor 10

Correct Answer:

decreases by a factor 20

Explanation:

We have, v = nλ ⇒ v ∞ λ (as n remains constant)
Thus, as v increases 10 times, λ also increases 10 times.

AIPMT2011
admin:

Related Questions

  1. The velocity of a particle at an instant is 10 ms⁻¹ and after 5 s the velocity
  2. Equal charge q each are placed at the vertices AQ and B of an equilateral triangle
  3. A steady current of 1.5 amp flows through a copper voltmeter for 10 minutes
  4. An electron having charge e and mass m is moving in a uniform electric field E.
  5. A particle covers half of its total distance with speed v1 and the rest half distance