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Q: y1 = 2sin(3x – 2t) & y2 = 3sin(3x – 2t + π/4). Find the expression for resultant displacement caused by superposition of the two waves.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: Consider the phenomenon of beats & select the correct statement.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: In a standing wave the amplitude of a particle is fixed, but varies from particle to particle. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: 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.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: If a string wave encounters a completely fixed end, what happens to its phase?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: What is the minimum distance between a node & an antinode in a standing wave?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: If a standing wave is vibrating in the fourth harmonic and the wavelength is λ, what is the length of the string.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: 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?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
physics
0
votes
Q: 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.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: Consider standing waves in an air column with one end closed. What is a pressure node?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: 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?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: Standing waves can be produced when two identical waves, having a phase difference of π, are travelling in the same direction. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: Consider the phenomenon of beats & select the correct statement.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: Two interfering waves have a frequency of 2Hz & 6Hz. What is the beat frequency?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
physics
0
votes
Q: 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,
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
cbse
0
votes
Q: Two longitudinal waves: s1 = 3cos(11t) & s2 = 3cos(10t) interfere. What is the amplitude of the resulting wave?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
physics
+1
vote
Q: 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
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
physics
0
votes
Q: 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’.
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
physics
+1
vote
Q: A source of sound moves towards an observer. What happens to the speed of sound in the medium?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
phisics
+1
vote
Q: 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?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
phisics
+1
vote
Q: If both the source of sound and observer are moving, the apparent frequency will be different from the actual frequency. True or False?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
physics
0
votes
Q: 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
vote
Q: 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?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
AdilsonLima
physics-class-xi
0
votes
Q: Which of these sentences is in active voice?
asked
Oct 3, 2021
in
Information Technology
by
Robin
active-voice
0
votes
Q: Which of these is an imperative sentence?
asked
Oct 3, 2021
in
Information Technology
by
Robin
imperative-sentence
0
votes
Q: Identify the indirect object in the sentence, ‘The band played music for the audience.’
asked
Oct 3, 2021
in
Information Technology
by
Robin
indirect-object
0
votes
Q: In which of these sentences can you find an adverb?
asked
Oct 3, 2021
in
Information Technology
by
Robin
adverb
0
votes
Q: Which of these sentences are punctuated correctly?
asked
Oct 3, 2021
in
Information Technology
by
Robin
punctuated-communication
0
votes
Q: Which of these sentences is capitalised correctly?
asked
Oct 3, 2021
in
Information Technology
by
Robin
capitalized-sentences
0
votes
Q: In which of the following, the underlined word is an adjective?
asked
Oct 3, 2021
in
Information Technology
by
Robin
communication-adjective
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