JEE Mains Physics 2002-2019 Solved Video Solutions
An electron (of mass m) and a photon have the same energy E in the range of a few eV. The ratio of the de-Broglie wavelength associated with the electron and the wavelength of the photon is (c = speed of light in vacuum)
23
Sep
An electron (of mass m) and a photon have the same energy E in the range of a few eV. The ratio of the de-Broglie wavelength associated with the electron and the wavelength of the photon is (c = speed of light in vacuum) Which of the following gives a reversible operation? September 23, 2021 [...]
A stationary observer receives sound from two identical tuning forks, one of which approaches and the other one recedes with the same speed (much less than the speed of sound). The observer hears 2 beats/sec. The oscillation frequency of each tuning fork is v0 = 1400 Hz and the velocity of sound in air is 350 m/s. The speed of each tuning fork is close to
23
Sep
A stationary observer receives sound from two identical tuning forks, one of which approaches and the other one recedes with the same speed (much less than the speed of sound). The observer hears 2 beats/sec. The oscillation frequency of each tuning fork is v0 = 1400 Hz and the velocity of sound in air is [...]
An elevator in a building can carry a maximum of 10 persons, with the average mass of each person being 68 kg. The mass of the elevator itself is 920 kg and it moves with a constant speed 3 m/s. The frictional force opposing the motion is 6000 N. If the elevator is moving up with its full capacity, the power delivered by the motor to the elevator (g = 10 m/s^2) must be at least :
23
Sep
An elevator in a building can carry a maximum of 10 persons, with the average mass of each person being 68 kg. The mass of the elevator itself is 920 kg and it moves with a constant speed 3 m/s. The frictional force opposing the motion is 6000 N. If the elevator is moving up [...]
In the figure, potential difference between A and B is
23
Sep
In the figure, potential difference between A and B is In the figure potential difference between A and B is September 23, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 ,
The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity, coercivity and saturation, respectively, of the material are:
19
Sep
The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity, coercivity and saturation, respectively, of the material are: coercivity and saturation of the material are: respectively The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity September 19, 2021 Category: JEE Mains Physics 2002-2019 Solved [...]
A box weighs 196 N on a spring balance at the north pole. Its weight recorded on the same balance if it is shifted to the equator is close to (Take g = 10 ms^–2 at the north pole and the radius of the earth = 6400 km):
19
Sep
A box weighs 196 N on a spring balance at the north pole. Its weight recorded on the same balance if it is shifted to the equator is close to (Take g = 10 ms^–2 at the north pole and the radius of the earth = 6400 km): The correct match between the entries in [...]
A mass of 10 kg is suspended by a rope of length 4 m, from the ceiling. A force F is applied horizontally at the mid-point of the rope such that the top half of the rope makes an angle of 45° with the vertical. Then F equals: (Take g = 10 ms^–2 and the rope to be massless)
19
Sep
A mass of 10 kg is suspended by a rope of length 4 m, from the ceiling. A force F is applied horizontally at the mid-point of the rope such that the top half of the rope makes an angle of 45° with the vertical. Then F equals: (Take g = 10 ms^–2 and the [...]
A thin lens made of glass (refractive index = 1.5) of focal length f = 16 cm is immersed in a liquid of refractive index 1.42. If its focal length in liquid is f1, then the ratio f1/f is closest to the integer :
19
Sep
A thin lens made of glass (refractive index = 1.5) of focal length f = 16 cm is immersed in a liquid of refractive index 1.42. If its focal length in liquid is f1, then the ratio f1/f is closest to the integer : A thin lens made of glass (refractive index = 1.5) of [...]
A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m), the kinetic energy of the particle (in J) is : (Figure drawn is schematic and not to scale; take g=10 ms^–2)___.
19
Sep
A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m), the kinetic energy of the particle (in J) is [...]
Tags:
A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C ,
the kinetic energy of the particle (in J) is : (Figure drawn is schematic and not to scale; take g=10 ms^–2)___. ,
the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1 m) ,
A non-isotropic solid metal cube has coefficients of linear expansion as : 5 × 10^–5/°C along the x-axis and 5 × 10^–6/°C along the y and the z-axis. If the coefficient of volume expansion of the solid is C × 10^–16/°C then the value of C is ______.
19
Sep
A non-isotropic solid metal cube has coefficients of linear expansion as : 5 × 10^–5/°C along the x-axis and 5 × 10^–6/°C along the y and the z-axis. If the coefficient of volume expansion of the solid is C × 10^–16/°C then the value of C is ______. The correct match between the entries in [...]