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A body is travelling east with a speed of 9 m/s with an acceleration of 2 m/s^2 acting west on it. the displacement of the body during the 5th sec of its motion is
10
Sep
A body is travelling east with a speed of 9 m/s with an acceleration of 2 m/s^2 acting west on it. the displacement of the body during the 5th sec of its motion is A body is travelling east with a speed of 9 m/s with an acceleration of 2 m/s^2 acting west on it. [...]
A bullet fired from a rifle loses 20% of its speed while passing through a wooden plank then minimum number of wooden planks repaired to completely stop the bullet is
10
Sep
A bullet fired from a rifle loses 20% of its speed while passing through a wooden plank then minimum number of wooden planks repaired to completely stop the bullet is A bullet fired from a rifle loses 20% of its speed while passing through a wooden plank then minimum number of wooden planks repaired to [...]
A small piece of cesium metal (phi = 1.9 eV) is kept at a distance of 17.7 cm from a large metal plate having a charge density of 1.0 * 10^-9 C/m^2 on the surface facing the cesium piece.
10
Sep
A small piece of cesium metal (phi = 1.9 eV) is kept at a distance of 17.7 cm from a large metal plate having a charge density of 1.0 * 10^-9 C/m^2 on the surface facing the cesium piece. A small piece of cesium metal (phi = 1.9 eV) is kept at a distance of [...]
Light is incident on the cathode of a photocell and the stopping voltages are measured for light of two different wavelengths. From the data given below, determine the work functions of
10
Sep
Light is incident on the cathode of a photocell and the stopping voltages are measured for light of two different wavelengths. From the data given below, determine the work functions of determine the work functions of Light is incident on the cathode of a photocell and the stopping voltages are measured for light of two [...]
If displacement x of a particle moving in straight line is given by x = {t}^{3} – 12t where t is time in sec and x in metre . find the acceleration of the particle, when velocity of the particle is 0
10
Sep
If displacement x of a particle moving in straight line is given by x = {t}^{3} – 12t where t is time in sec and x in metre . find the acceleration of the particle, when velocity of the particle is 0 If displacement x of a particle moving in straight line is given by [...]
The threshold frequency of a metal is f0. When the light of frequency 2f0 is incident on the metal plate, the maximum velocity of electrons emitted is f1. when the frequency of the incident radiation
10
Sep
The threshold frequency of a metal is f0. When the light of frequency 2f0 is incident on the metal plate, the maximum velocity of electrons emitted is f1. when the frequency of the incident radiation the maximum velocity of electrons emitted is f1. when the frequency of the incident radiation The threshold frequency of a [...]
Figures shows the variation of stopping potential V0 with the frequency f of the incident radiation for two photosensitive metals P and Q. (a) Explain which metal has smaller threshold wavelength.
10
Sep
Figures shows the variation of stopping potential V0 with the frequency f of the incident radiation for two photosensitive metals P and Q. (a) Explain which metal has smaller threshold wavelength. Figures shows the variation of stopping potential V0 with the frequency f of the incident radiation for two photosensitive metals P and Q. (a) [...]
Find the number of photons emitted per second by a 25 W source of monochromatic light of wavelength 6600 A. What is the photoelectric current assuming 3% efficiency for photoelectric effect?
10
Sep
Find the number of photons emitted per second by a 25 W source of monochromatic light of wavelength 6600 A. What is the photoelectric current assuming 3% efficiency for photoelectric effect? Find the number of photons emitted per second by a 25 W source of monochromatic light of wavelength 6600 A. What is the photoelectric [...]
The velocity of a particle as a function of time is v = v0 + gt + ft^2 where g and f are positive constant. if the position is x = 0 and t = 0 then find the displacement after t = 1
10
Sep
The velocity of a particle as a function of time is v = v0 + gt + ft^2 where g and f are positive constant. if the position is x = 0 and t = 0 then find the displacement after t = 1 The velocity of a particle as a function of time is [...]
An object, moving with a speed of 6.25 m/s, is decelerated at a rate given by: dt/dv = − 2.5v where v is the instantaneous speed. The time taken by the object, to come to rest, would be:
10
Sep
An object, moving with a speed of 6.25 m/s, is decelerated at a rate given by: dt/dv = − 2.5v where v is the instantaneous speed. The time taken by the object, to come to rest, would be: An object is decelerated at a rate given by: dt/dv = − 2.5v where v is the [...]