The distance between two consecutive crests in a wave train produced in string is 5 cm. If two complete waves pass through any point per second, the velocity of wave is:

Question

The distance between two consecutive crests in a wave train produced in string is 5 cm. If two complete waves pass through any point per second, the velocity of wave is: (A) 2.5 cm/sec (B) 5 cm/sec (C) 10 cm/sec (D) 15 cm/sec

Tardigrade Admin · Accepted Answer

Distance between two consecutive crests =5 cm ∴ wavelength λ=5 cm frequency n=2 ∴ velocity v=n λ =2 × 5=10 cm / sec.

Q. The distance between two consecutive crests in a wave train produced in string is $5 c m$ . If two complete waves pass through any point per second, the velocity of wave is:

2.5 cm/sec

5 cm/sec

10 cm/sec

15 cm/sec

Distance between two consecutive crests $= 5 c m$
$∴$ wavelength $λ = 5 c m$
frequency $n = 2$
$∴$ velocity $v = nλ$
$= 2 \times 5 = 10 c m / sec$ .

Q. The distance between two consecutive crests in a wave train produced in string is 5cm. If two complete waves pass through any point per second, the velocity of wave is: