Tag: physics

Questions Related to physics

A metal hammer hits a spherical bell, when the circuit in a calling bell is switched ON, the propogation of sound takes place due to 

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. Air

  2. electric current

  3. metal bell

  4. none of the above

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Correct Option: A
Explanation:

Though the hammer strikes the bell and the bell starts vibrating, these vibrations are then carried out to the atmosphere only by air molecules thereby creating a sound

The correct option is (a)

Waves that are combination of longitudinal and transverse nature are

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. water waves

  2. light waves

  3. shock waves

  4. sound waves

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Correct Option: A
Explanation:

Water waves are an example of waves that involve a combination of both longitudinal and transverse motions. As a wave travels through the waver, the particles travel in clockwise circles. The radius of the circles decreases as the depth into the water increases. The animation at right shows a water wave travelling from left to right in a region where the depth of the water is greater than the wavelength of the waves. I have identified two particles in orange to show that each particle indeed travels in a clockwise circle as the wave passes.

Particles in the combination of longitudinal and transverse waves moves in 

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. straight line

  2. circles

  3. rectangles

  4. vibrates

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Correct Option: B
Explanation:

Particles move in circular paths at the surface of a medium and hence form at the boundary of two mediums.

The correct option is (b)

Waves created in Tsunami are

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. Longitudinal waves

  2. Transverse waves

  3. Longitudinal and transverse waves

  4. Neither longitudinal or transverse

Show answer
Correct Option: C
Explanation:

Tsunami waves are water waves and hence have both the elements of transverse and longitudinal.

Thus option (c) is the correct option

Two particles in a medium are vibrating with a path difference of $10$ m and corresponding time difference is $0.1$s. The speed of wave in the medium is?

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. $100$ m/s

  2. $300$ m/s

  3. $50$ m/s

  4. $200$ m/s

Show answer
Correct Option: A
Explanation:

Path difference=10m

time difference=0.1 sec

Speed= $\dfrac{10}{0.1} $ m/s

$=100$ m/s

A transverse wave travels along z-axis. The particles of the medium moves

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. Along the z-axis

  2. Along the x-axis

  3. Along the y-axis

  4. In the x-y plane

Show answer
Correct Option: D
Explanation:

The particles of medium moves perpendicular to the direction of the propagation of the wave in the case of transverse wave.

In the given question, a transverse wave travels along z-axis. All the lines in the X-Y plane are perpendicular to z-axis, hence the particle of the medium must move in the X-Y plane.
The correct option is D.

The particle displacement of a travelling longitudinal wave is represented by S=S (x,t). The midpoints of a compression zone and an adjacent rarefaction zone are represented by the letter 'C' and 'R' Which of the following is true?

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. ${ \left| \partial S/\partial x \right| } _{ C }={ \left| \partial S/\partial x \right| } _{ R }$

  2. ${ \left| \partial S/\partial t \right| } _{ C }={ \left| \partial S/\partial t \right| } _{ R }=0$

  3. ${ \left( pressure \right) } _{ C }-{ \left( pressure \right) } _{ R }=2{ \left| \partial S/\partial x \right| } _{ C }x$ Bulk modulus of air.

  4. Particles of air are stationary mid-way between 'C' and 'R'.

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Correct Option: A

The equation of a transverse wave travelling in a rope is given by $y = 5\sin (4t - 0.02x)$, where $y$ and $x$ are in cm and time $t$ is in second.
Then the maximum transverse speed of wave in the rope is

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. $125\ cm/s$

  2. $200\ cm/s$

  3. $250\ cm/s$

  4. $100\ cm/s$

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Correct Option: B

Two small boats are $10m$ apart on a lake. Each pops up and down with a period of $4.0 seconds$ due to wave motion on the surface of water. When one boat is at its highest point, the other boat is at its lowest point. Both boats are always within a single cycle of the waves. The speed of the waves is:

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. $2.5m/s$

  2. $5.0m/s$

  3. $14m/s$

  4. $40m/s$

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Correct Option: B

Disturbance $y(x, t)$ of a wave propagating in the position x-direction is given by $y = \dfrac {1}{1 + x^{2}}$ at time $t = 0$ and by $y = \dfrac {1}{[1 + (x - 1^{2})]}$ at $t = 2\ s$, where $x$ and $y$ are in meters. The shape of the wave disturbance does not change during the propagation. The velocity of wave in m/s is

physics properties of waves longitudinal and transverse waves travelling waves types of waves

  1. $2.0$

  2. $4.0$

  3. $0.5$

  4. $1.0$

Show answer
Correct Option: B