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
Equations of two progressive waves at a certain point in a medium are given by y1=asin(ωt+ϕ1) and y2= a sin (ωt+ϕ2). If amplitude and time period of resultant wave are same as that of both the waves, then ϕ1−ϕ2 is?
25
Aug
Equations of two progressive waves at a certain point in a medium are given by y1=asin(ωt+ϕ1) and y2= a sin (ωt+ϕ2). If amplitude and time period of resultant wave are same as that of both the waves, then ϕ1−ϕ2 is? Equations of two progressive waves at a certain point in a medium are given by [...]
The equation of progressive wave is given by Y = 4 sin{π (5/t − 9/x) + 6/π} where x and y are in cm, which of the following statement is correct ?
25
Aug
The equation of progressive wave is given by Y = 4 sin{π (5/t − 9/x) + 6/π} where x and y are in cm, which of the following statement is correct ? The equation of progressive wave is given by Y=4 sin{π(5/t−9/x)+6/π} where x and y are in cm which of the following statement is [...]
A whistle revolves in a circle with angular speed ω=20 rad/sec using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz, then what is the minimum frequency heard by an observer which is far away from the centre : – ( V sound=340 m/s)
25
Aug
A whistle revolves in a circle with angular speed ω=20 rad/sec using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz, then what is the minimum frequency heard by an observer which is far away from the centre : – ( V sound=340 m/s) A whistle revolves [...]
An observer moves towards a stationary source of sound with a speed 1/5 th of the speed of sound. The wavelength and frequency of the source emitted are λ and f, respectively. The apparent frequency and wavelength recorded by the observer are, respectively.
25
Aug
An observer moves towards a stationary source of sound with a speed 1/5 th of the speed of sound. The wavelength and frequency of the source emitted are λ and f, respectively. The apparent frequency and wavelength recorded by the observer are, respectively. An observer moves towards a stationary source of sound with a speed [...]
A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The reflected sound heard by the driver has the frequency 2f. If v be the velocity of sound, then the velocity of the car, in the same velocity units will be :
25
Aug
A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The reflected sound heard by the driver has the frequency 2f. If v be the velocity of sound, then the velocity of the car, in the same velocity units will be : A car is moving towards a [...]
A mass m is suspended from the two coupled springs connected in series. The force constant for springs are k1 and k2. The time period of the suspended mass will be
25
Aug
A mass m is suspended from the two coupled springs connected in series. The force constant for springs are k1 and k2. The time period of the suspended mass will be A mass m is suspended from the two coupled springs connected in series. The force constant for springs are k1 and k2. The time [...]
Two springs of spring constants k1 and k2 are joined in series. The effective spring constant of the combination is given by –
25
Aug
Two springs of spring constants k1 and k2 are joined in series. The effective spring constant of the combination is given by –
The displacement x of a particle varies with time t as x = ae^ − αt + be^βt. Where a, b, α and β positive constant. The velocity of the particle will
25
Aug
The displacement x of a particle varies with time t as x = ae^ − αt + be^βt. Where a, b, α and β positive constant. The velocity of the particle will B The displacement x of a particle varies with time t as x=ae−αt+beβt. Where a α and β positive constant. The velocity of [...]
A simple pendulum is suspended from the roof of a trolley which moves in a horizontal direction with an acceleration α, then the time period is given by T=2π root (l/g) , where g is equal to
25
Aug
A simple pendulum is suspended from the roof of a trolley which moves in a horizontal direction with an acceleration α, then the time period is given by T=2π root (l/g) , where g is equal to A simple pendulum is suspended from the roof of a trolley which moves in a horizontal direction with [...]
Two simple pendulums of length 0.5 m and 20 m respectively are given small linear displacement in one direction at the same time. They will again be in the phase when the pendulum of shorter length has completed oscillations
25
Aug
Two simple pendulums of length 0.5 m and 20 m respectively are given small linear displacement in one direction at the same time. They will again be in the phase when the pendulum of shorter length has completed oscillations When an oscillator completes 100 oscillations its amplitude reduces to 1\3 of its initial value. What [...]