NEET Last 32 Years Solved 1988 – 2019 Physics and Chemistry Video Solutions
Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
A tuning fork of frequency 512 Hz makes 4 beats/s with the vibrating string of a piano. The beat frequency decreases to 2 beats/s when the tension in the piano string is slightly increased.The frequency of the piano string before increasing the tension was
31
Aug
A tuning fork of frequency 512 Hz makes 4 beats/s with the vibrating string of a piano. The beat frequency decreases to 2 beats/s when the tension in the piano string is slightly increased.The frequency of the piano string before increasing the tension was (n + 1). They superimpose to give beats. The number of [...]
Two source of sound placed closed to each other, are emitting progressive waves given by y1 = 4 sin 600πt and y2 = 5 sin 608πt. An observed located near these two sources will hear:
31
Aug
Two source of sound placed closed to each other, are emitting progressive waves given by y1 = 4 sin 600πt and y2 = 5 sin 608πt. An observed located near these two sources will hear: are emitting progressive waves given by y1 = 4 sin 600πt and y2 = 5 sin 608πt. An observed located [...]
A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per seconds, when sounded with a source of frequency 513 Hz. The unknown frequency is :
31
Aug
A source of unknown frequency gives 4 beats/s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per seconds, when sounded with a source of frequency 513 Hz. The unknown frequency is : A source of unknown frequency gives 4 beats/s when [...]
A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36 km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If the speed of sound is 343 m/s, the frequency of the honk as heard by him will be :
31
Aug
A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36 km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If the speed of sound is 343 m/s, the frequency of the honk as heard by [...]
A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from each other. The source is moving with a speed of 19.4ms^−1 at an angle of 60 with the source observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer is: (velocity of sound in air 330ms^−1)
31
Aug
A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from each other. The source is moving with a speed of 19.4ms^−1 at an angle of 60 with the source observer line as shown in the figure. The observer is at rest. The apparent frequency [...]
Three sound waves of equal amplitudes have frequencies (n − 1),n, (n + 1). They superimpose to give beats. The number of beats produced per second will be.
31
Aug
Three sound waves of equal amplitudes have frequencies (n − 1),n, (n + 1). They superimpose to give beats. The number of beats produced per second will be. (n + 1). They superimpose to give beats. The number of beats produced per second will be. n Three sound waves of equal amplitudes have frequencies (n [...]
A siren emitting a sound of frequency 800Hz moves away from an observer towards a cliff at a speed of 15ms^−1. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air = 330ms^−1)
31
Aug
A siren emitting a sound of frequency 800Hz moves away from an observer towards a cliff at a speed of 15ms^−1. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air = 330ms^−1) A siren emitting a sound of frequency 800Hz moves [...]
Two car moving in opposite directions approach each other with speed of 22m/s and 16.5m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound 340m/s].
31
Aug
Two car moving in opposite directions approach each other with speed of 22m/s and 16.5m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound 340m/s]. The period of oscillation of a mass M suspended from [...]
A mass of 2 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes a SHM. The spring constant is 200 N/m. What should be the minimum amplitude of motion, so that the mass gets detached from pan? [Given, g=10m/s^2]
31
Aug
A mass of 2 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes a SHM. The spring constant is 200 N/m. What should be the minimum [...]
The period of oscillation of a mass M suspended from a spring of negligible mass is T . If along with it another mass M is also suspended, the period of oscillation will now be
31
Aug
The period of oscillation of a mass M suspended from a spring of negligible mass is T . If along with it another mass M is also suspended, the period of oscillation will now be The period of oscillation of a mass M suspended from a spring of negligible mass is T . If along [...]