Physics question and answers for March 14, 2024
- Q 33 A sinusoidal wave is travelling on a string If the frequency of the wave is 150 Hz and mass per unit length of the string is 0 2 g...
- Q Q No 18 A thermodynamic system undergoes cyclic process ABCDA as shown in fig The work done by the system in the cycle is P 3P 2P P Vo Correct...
- Q Imagine a very thin uniform wire of length meter and total mass 1 gram Fix one end of the wire in the ceiling hang a large mass of 1 kg...
- Q person blows into open end of a long pipe As a result a high pressure pulse of air travels down e pipe When this pulse reaches the other end of...
- Q A tuning fork is kept between two organ pipes A and B Organ pipe A is closed at one end and is of length 18 cm while organ pipe B...
- Q Two cars A and B are moving in same direction such that A is behind B with same speed v and are blowing horn of frequency f If a cyclist...
- Q A closed organ pipe of length 28 cm closed at one end is found to be in resonance when a tuning for frequency 850 Hz is sounded near the open...
- Q 39 The intensity of sound during the festival season increased by 100 times This could imply a decibel level rise from a 20 to 120 dB c 100 to 10000...
- Q A sound wave is travelling in a uniform pipe with gas of adiabatic exponenty If u is the particle velocity dP at any point in medium and c is the...
- Q A point like sound source emits sound in all direction uniformly An observer who is at a distance of 50 m from the source detects sound of intensity 10 8...
- Q Two sound waves having time periods 0 01000 s and 0 00926 s respectively If the waves have same amplitudes and superpose travelling in the same direction then find the...
- Q 180 If the length of string of a sonometer wire is shortened by 75 and the tension is increased by 44 then the percentage by which resonating frequency is changed...
- Q frozen It is given Latent heat of vaporization of water at 0 C 21 10 J kg and latent heat of freezing of water 3 36 105J kg The maximum...
- Q Zero Marks 0 If none of the option is selected Negative Marks 1 If wrong option is selected A train is moving at a speed of v towards the railwayman...
- Q 39 Two monochromatic light waves are travelling with same frequency and constant phase different If both waves interfere then a there is a gain of energy b there is a...
- Q Two coherent sources of sound S and S2 produce sound waves of the same wavelength 1 m in phase S and S are placed 1 5 m apart see fig...
- Q The length of sonometer wire between two fixed ends is 100 cm Three bridges A B C are placed from left end so as to divide the wire into four...
- Q sity 24 If sound travels in air with the speed of 340 m s then number of tones present in an open organ pipe of length 2 m and its...
- Q 6 Two sound producing sources A and B are moving towards and away from a stationary observer with same speed respectively If frequency of sound produced by both sources are...
- Q If the third harmonic vibration in an open air pipe equals the fifth harmonic of vibration in an air pipe closed at one end the possible values of the length...
- Q A train is approaching a stationary with sounding a whistle Then the observer hears the sound of observer 1 Same frequency 2 Slightly lower frequency 3 Slightly higher frequency 4...
- Q Two persons P and are standing at a distance of 100 m from a high wall as shown in the figure When P gives a clap the time interval between...
- Q Frequency of tuning fork A is 250 Hz It produces 4 beats sec with another tuning fork B When A is filed the beat frequency is 6 beats sec The...
- Q A tuning fork vibrating with a sonometer wire of length 20 cm produces 5 beats per second The beat frequency does not change if the length of the wire is...
- Q A man standing between two large parallel cliffs produces a sound He hears the first echo after 6 s and next echo 2 s later If speed of sound is...
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