JEE Mains Physics 2002-2019 Solved Video Solutions
An engine takes in 5 moles of air at 20°C and 1 atm, and compresses it adiabatically to 1/10th of the original volume. Assuming air to be a diatomic ideal gas made up of rigid molecules, the change in its internal energy during this process comes out to be X kJ. The value of X to the nearest integer is ……
16
Sep
An engine takes in 5 moles of air at 20°C and 1 atm, and compresses it adiabatically to 1/10th of the original volume. Assuming air to be a diatomic ideal gas made up of rigid molecules, the change in its internal energy during this process comes out to be X kJ. The value of X [...]
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An engine takes in 5 moles of air at 20°C and 1 atm ,
and compresses it adiabatically to 1/10th of the original volume. Assuming air to be a diatomic ideal gas made up of rigid molecules ,
the change in its internal energy during this process comes out to be X kJ. The value of X to the nearest integer is ...... ,
A bead of mass m stays at point P(a, b) on a wire bent in the shape of a parabola y = 4Cx^2 and rotating with angular speed ω (see figure). The value of ω is (neglect friction)
16
Sep
A bead of mass m stays at point P(a, b) on a wire bent in the shape of a parabola y = 4Cx^2 and rotating with angular speed ω (see figure). The value of ω is (neglect friction) A bead of mass m stays at point P(a b) on a wire bent in the shape [...]
A particle of mass m with an initial velocity ui^ collides perfectly elastically with a mass 3 m at rest. It moves with a velocity v j^ after collision, then, v is given by
16
Sep
A particle of mass m with an initial velocity ui^ collides perfectly elastically with a mass 3 m at rest. It moves with a velocity v j^ after collision, then, v is given by A particle of mass m with an initial velocity ui^ collides perfectly elastically with a mass 3 m at rest. It [...]
If speed V, area A and force F are chosen as fundamental units, then the dimension of Young’s modulus will be
16
Sep
If speed V, area A and force F are chosen as fundamental units, then the dimension of Young’s modulus will be area A and force F are chosen as fundamental units If speed (V) then the dimension of Young’s modulus will be September 16, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice [...]
A cylindrical vessel containing a liquid is rotated about its axis so that the liquid rises at its sides as shown in the figure. The radius of vessel is 5 cm and the angular speed of rotation is ω rad s–1. The difference in the height, h (in cm) of liquid at the centre of vessel and at the side will be
16
Sep
A cylindrical vessel containing a liquid is rotated about its axis so that the liquid rises at its sides as shown in the figure. The radius of vessel is 5 cm and the angular speed of rotation is ω rad s–1. The difference in the height, h (in cm) of liquid at the centre of [...]
Two identical strings X and Z made of same material have tension TX and TZ in them. If their fundamental frequencies are 450 Hz and 300 Hz, respectively, then the ratio TX/TZ is
16
Sep
Two identical strings X and Z made of same material have tension TX and TZ in them. If their fundamental frequencies are 450 Hz and 300 Hz, respectively, then the ratio TX/TZ is respectively then the ratio TX/TZ is Two identical strings X and Z made of same material have tension TX and TZ in [...]
The mass density of a spherical galaxy varies as k/r over a large distance ‘r’ from its centre. In that region, a small star is in a circular orbit of radius R. Then the period of revolution, T depends on R as
16
Sep
The mass density of a spherical galaxy varies as k/r over a large distance ‘r’ from its centre. In that region, a small star is in a circular orbit of radius R. Then the period of revolution, T depends on R as a small star is in a circular orbit of radius R. Then the [...]
A beam of protons with speed 4 × 10^5 ms–1 enters a uniform magnetic field of 0.3 T at an angle of 60° to the magnetic field. The pitch of the resulting helical path of protons is close to (Mass of the proton = 1.67 × 10^–27 kg, charge of the proton = 1.69 × 10^–19 C)
16
Sep
A beam of protons with speed 4 × 10^5 ms–1 enters a uniform magnetic field of 0.3 T at an angle of 60° to the magnetic field. The pitch of the resulting helical path of protons is close to (Mass of the proton = 1.67 × 10^–27 kg, charge of the proton = 1.69 × [...]
An amplitude modulated wave is represented by the expression vm = 5(1 + 0.6cos6280t) sin(211 × 10^4t) volts. The minimum and maximum amplitudes of the amplitude modulated wave are, respectively :
16
Sep
An amplitude modulated wave is represented by the expression vm = 5(1 + 0.6cos6280t) sin(211 × 10^4t) volts. The minimum and maximum amplitudes of the amplitude modulated wave are, respectively : An amplitude modulated wave is represented by the expression vm = 5(1 + 0.6cos6280t) sin(211 × 10^4t) volts. The minimum and maximum amplitudes of [...]
The least count of the main scale of a vernier callipers is 1 mm. Its vernier scale is divided into 10 divisions and coincide with 9 divisions of the main scale. When jaws are touching each other, the 7th division of vernier scale coincides with a division of main scale and the zero of vernier scale is lying right side of the zero of main scale. When this vernier is used to measure length of a cylinder the zero of the vernier scale between 3.1 cm and 3.2 cm and 4th VSD coincides with a main scale division. The length of the cylinder is (VSD is vernier scale division)
16
Sep
The least count of the main scale of a vernier callipers is 1 mm. Its vernier scale is divided into 10 divisions and coincide with 9 divisions of the main scale. When jaws are touching each other, the 7th division of vernier scale coincides with a division of main scale and the zero of vernier [...]
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A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature t. Assuming the gases to be ideal and the oxygen bond to be rigid ,
The least count of the main scale of a vernier callipers is 1 mm. Its vernier scale is divided into 10 divisions and coincide with 9 divisions of the main scale. When jaws are touching each other ,
the total internal energy of the mixture is ,