JEE Mains Physics 2002-2019 Solved Video Solutions
An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The maximum and minimum diameters of the pipes are 6.4 cm and 4.8 cm, respectively. The ratio of the minimum and the maximum velocities of fluid in this pipe is:
23
Sep
An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The maximum and minimum diameters of the pipes are 6.4 cm and 4.8 cm, respectively. The ratio of the minimum and the maximum velocities of fluid in this pipe is: An ideal fluid flows (laminar flow) through a pipe of non-uniform diameter. The [...]
The activity of a radioactive sample falls from 700 s^–1 to 500 s^–1 in 30 minutes. Its half life is close to :
23
Sep
The activity of a radioactive sample falls from 700 s^–1 to 500 s^–1 in 30 minutes. Its half life is close to : The activity of a radioactive sample falls from 700 s^–1 to 500 s^–1 in 30 minutes. Its half life is close to : September 23, 2021 Category: JEE Mains Physics 2002-2019 Solved [...]
A particle of mass m and charge q has an initial velocity vector v = v0j. If an electric field vector E = E0i and magnetic field vector B = B0i act on the particle, its speed will double after a time:
23
Sep
A particle of mass m and charge q has an initial velocity vector v = v0j. If an electric field vector E = E0i and magnetic field vector B = B0i act on the particle, its speed will double after a time: A particle of mass m and charge q has an initial velocity vector [...]
A planar loop of wire rotates in a uniform magnetic field. Initially, at t = 0, the plane of the loop is perpendicular to the magnetic field. If it rotates with a period of 10 s about an axis in its plane then the magnitude of induced emf will be maximum and minimum, respectively at
23
Sep
A planar loop of wire rotates in a uniform magnetic field. Initially, at t = 0, the plane of the loop is perpendicular to the magnetic field. If it rotates with a period of 10 s about an axis in its plane then the magnitude of induced emf will be maximum and minimum, respectively at [...]
Under an adiabatic process, the volume of an ideal gas gets doubled. Consequently the mean collision time between the gas molecule changes from τ1 to τ2. If CP/CV = γ for this gas then a good estimate for τ2/τ1 is given by
23
Sep
Under an adiabatic process, the volume of an ideal gas gets doubled. Consequently the mean collision time between the gas molecule changes from τ1 to τ2. If CP/CV = γ for this gas then a good estimate for τ2/τ1 is given by the volume of an ideal gas gets doubled. Consequently the mean collision time [...]
Mass per unit area of a circular disc of radius a depends on the distance r from its centre as σ (r) = A + Br. The moment of inertia of the disc about the the axis, perpendicular to the plane and passing through its centre is
23
Sep
Mass per unit area of a circular disc of radius a depends on the distance r from its centre as σ (r) = A + Br. The moment of inertia of the disc about the the axis, perpendicular to the plane and passing through its centre is Mass per unit area of a circular disc [...]
In a Young’s double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light of wavelength 589 nm is used and the interference pattern is observed on a screen kept 1.5 m away. The separation between the successive bright fringes on the screen is:
23
Sep
In a Young’s double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light of wavelength 589 nm is used and the interference pattern is observed on a screen kept 1.5 m away. The separation between the successive bright fringes on the screen is: a source of light [...]
The dimension of B^2/2µ0, where B is magnetic field and µ0 is the magnetic permeability of vacuum, is:
23
Sep
The dimension of B^2/2µ0, where B is magnetic field and µ0 is the magnetic permeability of vacuum, is: is The dimension of B^2/2µ0 where B is magnetic field and µ0 is the magnetic permeability of vacuum September 23, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 ,
Two ideal Carnot engines operate in cascade (all heat given up by one engine is used by the other engine to produce work) between temperatures, T1 and T2. The temperature of the hot reservoir of the first engine is T1 and the temperature of the cold reservoir of the second engine is T2. T is temperature of the sink of first engine which is also the source for the second engine. How is T related to T1 and T2, if both the engines perform equal amount of work ?
23
Sep
Two ideal Carnot engines operate in cascade (all heat given up by one engine is used by the other engine to produce work) between temperatures, T1 and T2. The temperature of the hot reservoir of the first engine is T1 and the temperature of the cold reservoir of the second engine is T2. T is [...]
In a building there are 15 bulbs of 45 W, 15 bulbs of 100 W, 15 small fans of 10 W and 2 heaters of 1 kW. The voltage of electric main is 220 V. The minimum fuse capacity (rated value) of the building will be:
23
Sep
In a building there are 15 bulbs of 45 W, 15 bulbs of 100 W, 15 small fans of 10 W and 2 heaters of 1 kW. The voltage of electric main is 220 V. The minimum fuse capacity (rated value) of the building will be: 15 bulbs of 100 W 15 small fans of [...]