Subject: Physics (ch # 10,11) Class: X Total Marks: 40
i.
define the terms Periodic Motion with an example diagram.
ii.
What are damped oscillations?
iii.
What is a wave? Write its importance in our daily
life
iv.
Demonstrate the production and propagation of
waves with the vibratory motion of an object.
v.
How many categories of waves are there? Give
examples of each.
vi.
Waves are the means of energy transfer without the transfer of matter. Justify this statement with the help of a simple
experiment.
vii.
Does increasing the
frequency of a wave also increase the case of its wavelength? If not, how are these
quantities related?
viii.
What is Acoustics?
And how is the sound produced? Give an example.
ix.
How can you prove the mechanical
nature of sound by a simple experiment?
x.
Explain reflection of sound (Echo).
What is the condition of the Echo?
xi.
Define Ultrasonic and write their
uses.
xii.
What is the use of ultrasound in the medical field?
xiii.
Explain Noise Pollution and what is
the safe level of noise?
xiv.
What is the importance of acoustic
protection?
xv.
Describe Diffraction with a diagram.
Long Question
1.
(a) Write a note on “waves as a carrier of
energy”. Also, describe factors the amount of energy carried by the wave depends
upon.
(b) A marine survey ship sends a sound wave
straight to the sea bed. It receives an echo 1.5s later. The speed of sound in
seawater is 1500 ms-1. Find the depth of the sea at this position.
