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Recent questions in Class-XI-PHYSICS
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A source moves towards a stationary observer with a speed of 10m/s. If the frequency of the source is 10Hz what will be the wavelength of sound heard by the observer? Speed of sound = 330m/s.
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Oct 3, 2021
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Class-XI-PHYSICS
by
AdilsonLima
cbse
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If a string wave encounters a completely fixed end, what happens to its phase?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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What is the minimum distance between a node & an antinode in a standing wave?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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If a standing wave is vibrating in the fourth harmonic and the wavelength is λ, what is the length of the string.
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Consider the case of normal modes of vibration for the air column with only one end closed. What is the length of the air column for the fundamental harmonic?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
physics
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A pipe is open at both ends. What should be its length such that it resonates a 10Hz source in the 2nd harmonic? Speed of sound in air = 340m/s.
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Consider standing waves in an air column with one end closed. What is a pressure node?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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A pipe open at both ends has a fundamental frequency of 2Hz. If the pipe is closed at one end and half filled with water, what will be the fundamental frequency?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Standing waves can be produced when two identical waves, having a phase difference of π, are travelling in the same direction. True or False?
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Oct 3, 2021
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Class-XI-PHYSICS
by
AdilsonLima
cbse
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Consider the phenomenon of beats & select the correct statement.
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Oct 3, 2021
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Class-XI-PHYSICS
by
AdilsonLima
cbse
0
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1
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Two interfering waves have a frequency of 2Hz & 6Hz. What is the beat frequency?
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Oct 3, 2021
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Class-XI-PHYSICS
by
AdilsonLima
physics
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Let’s say we can hear a beat frequency of 2Hz from two tuning forks. The first tuning fork has a frequency of 100Hz. If wax is applied on the 2nd tuning fork, the beat frequency becomes 4Hz,
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Two longitudinal waves: s1 = 3cos(11t) & s2 = 3cos(10t) interfere. What is the amplitude of the resulting wave?
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Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
physics
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1
answer
An observer is standing stationary in air moving at a speed of 2m/s. A source of frequency 20Hz is moving in the direction of wind with speed 10m/s towards the observer. W
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
physics
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A train with a frequency ‘f’. What will be the frequency heard by a person sitting in the train? Speed of the train is ‘v’.
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
physics
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A source of sound moves towards an observer. What happens to the speed of sound in the medium?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
phisics
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1
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A source moves towards a stationary observer with a speed of 10m/s. If the frequency of the source is 10Hz what will be the wavelength of sound heard by the observer?
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Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
phisics
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1
answer
If both the source of sound and observer are moving, the apparent frequency will be different from the actual frequency. True or False?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
physics
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A man is moving towards a wall with a source of sound in his hand. Frequency of source = 50Hz. Speed of man = 8m/s.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
physics-class-xi
+1
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1
answer
A source of frequency 50Hz is moving towards an observer with a deceleration of 2m/s^2. If its initial speed is 20m/s, what will be the maximum frequency heard by the observer?
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Oct 3, 2021
in
Class-XI-PHYSICS
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AdilsonLima
physics-class-xi
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