Waves Test - 19...

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : Two persons on the surface of moon cannot talk to each other.

Reason : There is no atmosphere on moon.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : Sound waves cannot propagate through vacuum but light waves can.

Reason : Sound waves cannot be polarised but light waves can be polarised.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : Ocean waves hitting a beach are always found to be nearly normal to the shore.

Reason : Ocean waves are longitudinal waves.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : Transverse waves travel through air in an organ pipe.

Reason : Air possesses only volume elasticity.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : The basic of Laplace correction was that, exchange of heat between the region of compression and rarefaction in air is not possible.

Reason : Air is a bad conductor of heat and velocity of sound in air is large.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : When we start filling an empty bucket with water, the pitch of sound produced goes on decreasing.

Reason : The frequency of man voice is usually higher than that of woman.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : Solids can support both longitudinal and transverse waves but only longitudinal waves can propagate in gases.

Reason : For the propagation of transverse waves, medium must also neccessarly have the property of rigidity.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : The speed of sound in solids is maximum though their density is large.

Reason : The coefficient of elasticity of solid is large.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : On a rainy day sound travel slower than on a dry day.

Reason : When moisture is present in air the density of air increases.

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion : To hear distinct beats, difference in frequencies of two sources should be less than 10.

Reason : More the number of beats per sec more difficult to hear them.