Question

Q1. Wave travel at 30m/s through a certain medium if 10 waves pass a certain point per second find.
A) the frequency B) the wavelength
Q2. If 120 waves are produced per minute ,find A),the frequency B) the period

Answer 1

Answer:

Q-1

Part a) Frequency of wave is 10 Hz

Part b) wavelength is 3 m

Q-2

Part a) Frequency of wave is 2 Hz

Part b) wavelength is 15 m

Explanation:

Q-1

Part a)

Number of waves passing a given point per second is known as frequency of wave

So here we have

$f = 10 waves per second$

$f = 10 Hz$

Part b)

speed of wave in the given medium is

$v = 30 m/s$

so we have wavelength given as

$\lambda = \frac{v}{f}$

$\lambda = \frac{30}{10} = 3 m$

Q-2

Part a)

Number of waves passing a given point per second is known as frequency of wave

So here we have

$f = 120 waves per minute$

$f = 2 Hz$

Part b)

speed of wave in the given medium is

$v = 30 m/s$

so we have wavelength given as

$\lambda = \frac{v}{f}$

$\lambda = \frac{30}{2} = 15 m$

#Learn

Topic : Waves

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