Tag: physics

Questions Related to physics

In gases which wave cannot propagate

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

  1. standing wave

  2. longitudinal wave

  3. transverse wave

  4. none

Show answer
Correct Option: C
Explanation:

Transverse waves cannot propagate in gases because there are no forces to cause motion perpendicular to the direction of the wave. A transverse wave propagates in a solid because each atom of the solid has an "equilibrium location" where the forces on it from all its neighboring atoms balance. If one atom is pulled out of its equilibrium location by a disturbance, it will tend to be pulled back to that location. However, when it's out of its equilibrium location, it pulls its neighbors out of their equilibrium locations too, and so on down the line. The result is that a transverse wave disturbance propagates through the material.

A transverse wave consists of:

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

  1. only crest

  2. only trough

  3. both crest and trough

  4. rarefaction and compressions

Show answer
Correct Option: C
Explanation:

A transverse wave travels through a medium in the form of crests and troughs.

Hence it consists of both crests and troughs
Option C is the right answer

For propagation of a mechanical wave, the medium must possess

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

  1. inertia

  2. conductivity

  3. plasticity

  4. elasticity

Show answer
Correct Option: A,D
Explanation:
  • MEDIUM SHOULD BE ISOTROPIC: The properties of the medium should be the same in all directions.
  • ELASTICITY : The medium should have elasticity so that the particles return back to their original positions after being displaced.
  • INERTIA : This allows the particles to store kinetic energy.
  • MINIMUM FRICTION : So that the particles oscillate and the wave travels for a sufficiently long time and distance.
  • these were the properties required for propagation of mechanical waves , so the answer is A and D.

Waves can undergo

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

  1. reflection

  2. refraction

  3. diffraction

  4. All of the above 

Show answer
Correct Option: D
Explanation:

waves can go reflection , refraction and diffraction  like  light being an EM wave performs all these phenomenons.

so the answer is D.

Water waves are an example of waves that involve

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

  1. longitudinal motions.

  2. transverse motions.

  3. a combination of both longitudinal and transverse motions

  4. some unknown type of motions,

Show answer
Correct Option: C
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.

so the answer is C.

Which of the following waves do not require any kind of medium to propagate ?

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

  1. Sound waves

  2. Earthquake

  3. Light Waves

  4. Water surface waves

Show answer
Correct Option: C
Explanation:

electromagnetic waves donot require medium for propagation . light is a EM wave.

so the answer is C.

State whether true or false :
With the change of medium, the frequency doesn't change, however both the velocity and wavelength change 

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

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

with change in medium the wavelength and velocity of wave both are changed but being property of source remains constant and doesnot change.

so the answer is A

With propagation of longitudinal waves through a medium, the quantity transmitted is : 

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

  1. matter

  2. energy

  3. energy and matter

  4. energy, matter and momentum

Show answer
Correct Option: B
Explanation:

longitudinal waves are propagated by  propagation of energy by particles of the medium.

so the answer is B.

When a wave is reflected from a ___________ medium, there is a phase change of $\pi$.

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

  1. rarer

  2. denser

  3. both

  4. none of the above

Show answer
Correct Option: B
Explanation:

when reflection of wave takes place from the denser medium then  it undergoes a phase change of $\pi$ . 

answer is B.

State true or false :
Mechanical Waves are waves which propagate through a material medium.

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

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

mechanical waves  are waves which needs medium for propogation.. energy is transferred  while propagation from particle to particle of medium.

so the answer is A