Please select a subject first
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State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give a reason to your answer.
Concept: undefined >> undefined
Describe a simple experiment which demonstrates that the sound produced by a tuning fork is due to vibrations of its arms.
Concept: undefined >> undefined
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There is no atmosphere on moon. Can you hear each other on the moon's surface?
Concept: undefined >> undefined
Explain with an example, the propagation of sound in a medium.
Concept: undefined >> undefined
Choose the correct word/words to complete the following sentence :
When sound travels in a medium ____________
Concept: undefined >> undefined
Name the two kinds of waves in form of which sound travels in a medium.
Concept: undefined >> undefined
What is a longitudinal wave? In which medium: solid, liquid or gas, can it be produced?
Concept: undefined >> undefined
Explain the terms crest and trough in relation to a transverse wave.
Concept: undefined >> undefined
Describe an experiment to show that in wave motion, only energy is transferred, but particles of medium do not move.
Concept: undefined >> undefined
How is the frequency of a wave related to its time period?
Concept: undefined >> undefined
If you place your ear close to an iron railing which is tapped some distance away, you hear the sound twice. Explain why?
Concept: undefined >> undefined
How does the speed of sound change with change in (i) amplitude and (ii) wavelength, of sound wave?
Concept: undefined >> undefined
How does the following factor affect, if at all, the speed of sound in air:
Frequency of sound
Concept: undefined >> undefined
How does the following factor affect, if at all, the speed of sound in air:
Temperature of air
Concept: undefined >> undefined
How does the following factor affect, if at all, the speed of sound in air:
Pressure of air
Concept: undefined >> undefined
How does the following factor affect, if at all, the speed of sound in air:
Moisture in air
Concept: undefined >> undefined
Complete the following sentence :
A longitudinal wave is composed of compression and ____________.
Concept: undefined >> undefined
Complete the following sentence :
A transverse wave is composed of crest and ____________.
Concept: undefined >> undefined
The time period of a simple pendulum is 2 s. Find its frequency.
Concept: undefined >> undefined
