JEE Mains Physics 2002-2019 Solved Video Solutions
A two point charges 4q and –q are fixed on the x-axis at x = -d /2 and x = d/2, respectively. If a third point charge ‘q’ is taken from the origin to x = d along the semicircle as shown in the figure, the energy of the charge will
18
Sep
A two point charges 4q and –q are fixed on the x-axis at x = -d /2 and x = d/2, respectively. If a third point charge ‘q’ is taken from the origin to x = d along the semicircle as shown in the figure, the energy of the charge will A two point charges [...]
A beam of plane polarised light of large cross-sectional area and uniform intensity of 3.3 Wm^–2 falls normally on a polariser (cross sectional area 3 × 10^–4 m^2) which rotates about its axis with an angular speed of 31.4 rad/s. The energy of light passing through the polariser per revolution, is close to
18
Sep
A beam of plane polarised light of large cross-sectional area and uniform intensity of 3.3 Wm^–2 falls normally on a polariser (cross sectional area 3 × 10^–4 m^2) which rotates about its axis with an angular speed of 31.4 rad/s. The energy of light passing through the polariser per revolution, is close to A balloon [...]
When an object is kept at a distance of 30cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9cm s^(-1) the speed with which the image moves at that instant is
18
Sep
When an object is kept at a distance of 30cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9cm s^(-1) the speed with which the image moves at that instant is the image is formed at a distance of 10 [...]
An massless equilateral triangle EFG of side ‘a’ (As shown in figure) has three particles of mass m situated at its vertices. The moment of inertia of the system about the line EX perpendicular to EG in the plane of EFG is N/20(ma^2) where N is an integer. The value of N is _________.
18
Sep
An massless equilateral triangle EFG of side ‘a’ (As shown in figure) has three particles of mass m situated at its vertices. The moment of inertia of the system about the line EX perpendicular to EG in the plane of EFG is N/20(ma^2) where N is an integer. The value of N is _________. A [...]
If minimum possible work is done by a refrigerator in converting 100 grams of water at 0°C to ice, how much heat (in calories) is released to the surroundings at temperature 27°C (Latent heat of ice = 80 Cal/gram) to the nearest integer ?
18
Sep
If minimum possible work is done by a refrigerator in converting 100 grams of water at 0°C to ice, how much heat (in calories) is released to the surroundings at temperature 27°C (Latent heat of ice = 80 Cal/gram) to the nearest integer ? how much heat (in calories) is released to the surroundings at [...]
A block starts moving up an inclined plane of inclination 30° with an initial velocity of v0. It comes back to its initial position with velocity v0/2 .he value of the coefficient of kinetic friction between the block and the inclined plane is close to I / 1000 . The nearest integer to I is _________.
18
Sep
A block starts moving up an inclined plane of inclination 30° with an initial velocity of v0. It comes back to its initial position with velocity v0/2 .he value of the coefficient of kinetic friction between the block and the inclined plane is close to I / 1000 . The nearest integer to I is [...]
A galvanometer coil has 500 turns and each turn has an average area of 3 × 10^–4 m^2. If a torque of 1.5 Nm is required to keep this coil parallel to a magnetic field when a current of 0.5 A is flowing through it, the strength of the field (in T) is __________.
18
Sep
A galvanometer coil has 500 turns and each turn has an average area of 3 × 10^–4 m^2. If a torque of 1.5 Nm is required to keep this coil parallel to a magnetic field when a current of 0.5 A is flowing through it, the strength of the field (in T) is __________. A [...]
The radius of R of a nucleus of mass number A can be estimated by the formula R = (1.3 × 10^–15)A^1/3 m. It follows that the mass density of a nucleus is of the order of:
18
Sep
The radius of R of a nucleus of mass number A can be estimated by the formula R = (1.3 × 10^–15)A^1/3 m. It follows that the mass density of a nucleus is of the order of: The radius of R of a nucleus of mass number A can be estimated by the formula R [...]
Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a component, are just reversed?
18
Sep
Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a component, are just reversed? are just reversed? Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a component September 18, 2021 Category: JEE Mains Physics [...]
If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm, then its band gap energy is (Planck’s constant h = 6.63 × 10^–34 J.s. Speed of light c = 3 × 10^8 m/s )
18
Sep
If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm, then its band gap energy is (Planck’s constant h = 6.63 × 10^–34 J.s. Speed of light c = 3 × 10^8 m/s ) If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm then [...]