JEE Mains Physics 2002-2019 Solved Video Solutions
A thin rod of mass 0.9 kg and length 1 m is suspended, at rest, from one end so that it can freely oscillate in the vertical plane. A particle of move 0.1 kg moving in a straight line with velocity 80 m/s hits the rod at its bottom most point and sticks to it (see figure). The angular speed (in rad/s) of the rod immediately after the collision will be ____ .
19
Sep
A thin rod of mass 0.9 kg and length 1 m is suspended, at rest, from one end so that it can freely oscillate in the vertical plane. A particle of move 0.1 kg moving in a straight line with velocity 80 m/s hits the rod at its bottom most point and sticks to it [...]
The surface of a metal is illuminated alternately with photons of energies E1 = 4 eV and E2 = 2.5 eV respectively. The ratio of maximum speeds of the photoelectrons emitted in the two cases is 2. The work function of the metal in (eV) is _____.
19
Sep
The surface of a metal is illuminated alternately with photons of energies E1 = 4 eV and E2 = 2.5 eV respectively. The ratio of maximum speeds of the photoelectrons emitted in the two cases is 2. The work function of the metal in (eV) is _____. The correct match between the entries in table [...]
A prism of angle A = 1° has a refractive index μ = 1.5. A good estimate for the minimum angle of deviation (in degrees) is close to N/10. Value of N is ____ .
19
Sep
A prism of angle A = 1° has a refractive index μ = 1.5. A good estimate for the minimum angle of deviation (in degrees) is close to N/10. Value of N is ____ . A prism of angle A = 1° has a refractive index μ = 1.5. A good estimate for the minimum [...]
Nitrogen gas is at 300°C temperature. The temperature (in K) at which the rms speed of a H2 molecule would be equal to the rms speed of a nitrogen molecule, is ___ . (Molar mass of N2 gas 28 g).
19
Sep
Nitrogen gas is at 300°C temperature. The temperature (in K) at which the rms speed of a H2 molecule would be equal to the rms speed of a nitrogen molecule, is ___ . (Molar mass of N2 gas 28 g). is ___ . (Molar mass of N2 gas 28 g). Nitrogen gas is at 300°C [...]
A body of mass 2 kg is driven by an engine delivering a constant power of 1 J/s. The body starts from rest and moves in a straight line. After 9 seconds, the body has moved a distance (in m) …………..
19
Sep
A body of mass 2 kg is driven by an engine delivering a constant power of 1 J/s. The body starts from rest and moves in a straight line. After 9 seconds, the body has moved a distance (in m) ………….. A body of mass 2 kg is driven by an engine delivering a constant [...]
An iron rod of volume 10^–3 m^3 and relative permeability 1000 is placed as core in a solenoid with 10 turns/cm. If a current of 0.5 A is passed through the solenoid, then the magnetic moment of the rod will be
19
Sep
An iron rod of volume 10^–3 m^3 and relative permeability 1000 is placed as core in a solenoid with 10 turns/cm. If a current of 0.5 A is passed through the solenoid, then the magnetic moment of the rod will be An iron rod of volume 10^–3 m^3 and relative permeability 1000 is placed as [...]
In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential at point B with respect to the point A is
19
Sep
In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential at point B with respect to the point A is given in the figure currents in different branches and value of one resistor are shown. Then potential at point B with respect to the point [...]
The acceleration due to gravity on the earth’s surface at the poles is g and angular velocity of the earth about the axis passing through the pole is ω. An object is weighed at the equator and at a height h above the poles by using a spring balance. If the weights are found to be same, then h is (h
19
Sep
The acceleration due to gravity on the earth’s surface at the poles is g and angular velocity of the earth about the axis passing through the pole is ω. An object is weighed at the equator and at a height h above the poles by using a spring balance. If the weights are found to [...]
In an adiabatic process, the density of a diatomic gas becomes 32 times its initial value. The final pressure of the gas is found to be n times the initial pressure. The value of n is
19
Sep
In an adiabatic process, the density of a diatomic gas becomes 32 times its initial value. The final pressure of the gas is found to be n times the initial pressure. The value of n is In an adiabatic process the density of a diatomic gas becomes 32 times its initial value. The final pressure [...]
The quantities x = 1/√μoεo, y = E/B and z = l/CR are defined where C-capacitance, R-Resistance, l-length, E-Electric field, B-magnetic field, εo free space permittivity and μo is permeability, respectively. Then
19
Sep
The quantities x = 1/√μoεo, y = E/B and z = l/CR are defined where C-capacitance, R-Resistance, l-length, E-Electric field, B-magnetic field, εo free space permittivity and μo is permeability, respectively. Then B-magnetic field E-Electric field L = length R = resistance) respectively then. The quantities x = 1/√μoεo y = E/B and z = [...]