Question

[ Answer these ]

1.) During wave motion, there is no transfer of ____ through the medium.

2.) Mechanical waves cannot travel through ____.

3.) Electromagnetic waves are ____.

4.) Sound waves are ____.

5.) ____ waves consist of compressions and rarefactions.

6.) ____ waves consists of crests and troughs.

7.) A wave of short duration is called a ____.

8.) A ____ exists for a longer duration.

9.) ____ is the S.I unit of frequency.

10.) The S.I unit of time period is ____.

11.) A source of wave produces 10 crests and 10 troughs in 0.1 s. The frequency of the wage is ?​

Answer 1

$\Large{\boxed{\boxed{\bf{AnswEr:-}}}}$

❶ During wave motion, there is no transfer of matter through the medium.

❷  Mechanical waves cannot travel through Vacuum.

❸ Electromagnetic waves are Transverse waves.

❹  Sound waves are Mechanical waves.

❺ Longitudinal waves waves consist of compressions and rarefactions.

❻ Transverse waves waves consists of crests and troughs.

❼ A wave of short duration is called a Pulse.

❽ A wave exists for a longer duration.

❾  Hertz (Hz) is the S.I unit of frequency.

❿ The S.I unit of time period is Second.

✧ A source of wave produces 10 crests and 10 troughs in 0.1 s. The frequency of the wage is ?

GIVEN:

• 10 crests and 10 troughs constitute a wave in 0.1 sec.

TO FIND:

• What is the frequency of wave ?

SOLUTION:

➠ TIME PERIOD = $\sf{\dfrac{0.1}{10}}$

➠ TIME PERIOD = 0.01 sec

$\large{\boxed{\bf{FREQUENCY = \dfrac{1}{TIME \: PERIOD}}}}$

According to question:-

➠ FREQUENCY = $\sf{\dfrac{1}{0.01}}$

【FREQUENCY = 100 Hz】

______________________

Answer 2

1.matter

2.vaccum

3.tranverse rays

4.mechanical waves

5.lontudinal waves

6.pulse

7.wave

8.hertz

9.second

10.11 hertz