Time Period

Q.

A person is listening to a tone of $500Hz$ sitting at a distance of $450m$ from the source of the sound. What is the time interval between successive compressions from the source?

Q.

What is the time - period of a tuning fork whose frequency is 200 Hz ?

Q.

A wave of frequency $500\text{Hz}$travels between $\text{X}$ and $\text{Y}$, a distance of $600\text{m}$ in $2$ sec. How many wavelength are there in distance $\mathrm{XY}$?

1. $1000$

2. $300$

3. $180$

4. $2000$

Q.

1 hertz is equal to ___________ .

1. 1 vibration per minute

2. 10 vibration per minute

3. 60 vibrations per minute.

4. 600 vibrations per minute.

Q.

Time period of a sound wave is defined as:

1. time between the occurrence of two peaks

2. time between the occurrence of two valleys

3. time taken by two consecutive peaks/valleys to cross a fixed point

4. all of the above

Q.

Calculate the period and frequency for the seconds hand , minute hand and hour hand of a clock .

Q.

The frequency of a tuning fork is $256Hz$. Find its time period.

Q.

SI unit of frequency is

1. metre per second

2. hertz

3. metre

4. seconds

Q.

The frequency of a wave traveling at a speed of 500 m/sec is 25 Hz. Its time period is

1. 20 s

2. 0.05 s

3. 25 s

4. 0.04 s

Q.

Obtain the relation between wavelength, velocity, and frequency of a wave?

Q.

A bell vibrates 600 times within 3/2 seconds, its frequency and time period will be:

1. 900 Hz; 1.1 s

2. 400 Hz; 0.25 s

3. 400 Hz; 0.0025s

4. 900 Hz, 0.0011 s

Q.

A Swiss watch is being shown in a museum which has a very peculiar property.

It gains as much in the day as it loses during the night between $8pm$ to $8am$

In a week how many times will the clock show the correct time?

Q. Time taken by a sound wave to complete one oscillation is called time period.

Q.

A person is sitting $200m$ away from a $20hertz$ sound source. What is the time interval at which successive compressions pulses from the source reach him?

Q. A source produces $200$ oscillations per $2$ seconds. Its time period is________.

1. $0.01s$
2. $0.01s$
3. $0.01s$
4. $0.02s$

Q.

Sound travels fastest in which of the following substances

1. Solids

2. Liquids

3. Gases

4. None of the above

Q. Sound travels faster than light in the air.

1. True
2. False

Q. Where do you observe Pascal's principle in our daily life? Give few examples.

Q.

Time period (T) is related to frequency (f) as:

1. $T=\frac{1}{f}$

2. $T=f$

3. $T\times f=0$

4. $T\times f=v$
   where v: speed of sound wave

Q.

Calculate the speed of EM wave in a glass slab in which the frequency of EM wave is $4\times {10}^{14}Hz$ and wavelength is$500nm$.

Q.

What is the speed of a 150 Hz wave whose wavelength is measured to be 0.3 m?

1. 45 m/sec

2. 50 m/sec

3. 0.002 m/sec

4. none

Q. The sound produced by a seconds pendulum will be audible to us.

1. True
2. False

Q.

Establish a relation between velocity, frequency and wavelength of the wave

Q. The wavelength of waves produced by a source is $50\text{cm}$. If wave velocity is $25{\text{m s}}^{-1}$, what is the time required for one wave to generate?

1. 0.02

Q.

A person is listening to a sound tone of $600Hz$ from a musical instrument, sitting $400m$ away from it. What is the time interval between two successive compressions from the instrument?

Q. A vibrator generates the waves of the speed $330m{s}^{–1}$ and wavelength 0.8 m. Then the frequency and time period is

1. 264 Hz, 0.0037 second
2. 42.5 Hz, 0.0024 second
3. 412.5 Hz, 0.0024 second
4. 264 Hz, 0.0030 second

Q.

Write the relationship between velocity, wavelength and frequency of a wave.

Q.

What is the relation between frequency, wavelength and wave velocity of a wave?

Q. A simple pendulum completes oscillations in one minute. Find its (a) frequency, (b) time period.

Q.

During time equal to periodic time the distance travelled by a wave in the direction of wave propagation is known as what