JEE Mains Physics 2002-2019 Solved Video Solutions
A plane electromagnetic wave of frequency 100 MHz is travelling in vacuum along the x-direction. At a particular point in space and time, B→=2.0×10^−8k^T. (where, k^ is unit vector along z-direction) What is E→ at this point ?
28
Sep
A plane electromagnetic wave of frequency 100 MHz is travelling in vacuum along the x-direction. At a particular point in space and time, B→=2.0×10^−8k^T. (where, k^ is unit vector along z-direction) What is E→ at this point ? A plane electromagnetic wave of frequency 100 MHz is travelling in vacuum along the x-direction. At a [...]
An oil drop of radius 2 mm with a density 3g cm^–3 is held stationary under a constant electric field 3.55 × 10^5 V m^–1 in the Millikan’s oil drop experiment. What is the number of excess electrons that the oil drop will possess ? (consider g = 9.81 m/s^2)
28
Sep
An oil drop of radius 2 mm with a density 3g cm^–3 is held stationary under a constant electric field 3.55 × 10^5 V m^–1 in the Millikan’s oil drop experiment. What is the number of excess electrons that the oil drop will possess ? (consider g = 9.81 m/s^2) Red light differs from blue [...]
A 2 μF capacitor C1 is first charged to a potential difference of 10 V using a battery. Then the battery is removed and the capacitor is connected to an uncharged capacitor C2 of 8μF. The charge in C2 on equilibrium condition is……….μC. (Round off to the Nearest Integer)
28
Sep
A 2 μF capacitor C1 is first charged to a potential difference of 10 V using a battery. Then the battery is removed and the capacitor is connected to an uncharged capacitor C2 of 8μF. The charge in C2 on equilibrium condition is……….μC. (Round off to the Nearest Integer) Red light differs from blue light [...]
The image of an object placed in air formed by a convex refracting surface is at a distance of 10 m behind the surface. The image is real and is at 2^rd/3 of the distance of the object from the surface. The wavelength of light inside the surface is 2/3 times the wavelength in air. The radius of the curved surface is x/13 m. The value of ‘x’ is ___________.
28
Sep
The image of an object placed in air formed by a convex refracting surface is at a distance of 10 m behind the surface. The image is real and is at 2^rd/3 of the distance of the object from the surface. The wavelength of light inside the surface is 2/3 times the wavelength in air. [...]
The electric field in a region is given by → E = 2/5 E 0 ^ i + 3/5 E 0 ^ j with E0 = 4.0 × 10^3 N/C .The flux of this field through a rectangular surface area 0.4 m^2 parallel to the Y – Z plane is……….Nm^2C^–1
28
Sep
The electric field in a region is given by → E = 2/5 E 0 ^ i + 3/5 E 0 ^ j with E0 = 4.0 × 10^3 N/C .The flux of this field through a rectangular surface area 0.4 m^2 parallel to the Y – Z plane is……….Nm^2C^–1 Red light differs from blue [...]
A particle of mass m moves in a circular orbit in a central potential field U(r) = U0r^4 . If Bohr’s quantization conditions are applied, radii of possible orbitals rn vary with n^1/α , where α is…………
28
Sep
A particle of mass m moves in a circular orbit in a central potential field U(r) = U0r^4 . If Bohr’s quantization conditions are applied, radii of possible orbitals rn vary with n^1/α , where α is………… A particle of mass m moves in a circular orbit in a central potential field U(r) = U0r^4 [...]
The electric field intensity produced by the radiation coming from a 100 W bulb at a distance of 3m is E. The electric field intensity produced by the radiation coming from 60 W at the same distance is √ x/5 E. where the value of x =………..
28
Sep
The electric field intensity produced by the radiation coming from a 100 W bulb at a distance of 3m is E. The electric field intensity produced by the radiation coming from 60 W at the same distance is √ x/5 E. where the value of x =……….. Red light differs from blue light as they [...]
A sphere of mass 2kg and radius 0.5 m is rolling with an initial speed of 1 ms^–1 goes up an inclined plane which makes an angle of 30° with the horizontal plane, without slipping. How low will the sphere take to return to the starting point A ?
28
Sep
A sphere of mass 2kg and radius 0.5 m is rolling with an initial speed of 1 ms^–1 goes up an inclined plane which makes an angle of 30° with the horizontal plane, without slipping. How low will the sphere take to return to the starting point A ? A sphere of mass 2kg and [...]
What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved ?
28
Sep
What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved ? What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved ? September 28, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 [...]
Two identical photocathodes receive light of frequencies f1 and f2 . If the velocities of the photoelectrons (of mass m) coming out are v1 and v2 respectively , then
28
Sep
Two identical photocathodes receive light of frequencies f1 and f2 . If the velocities of the photoelectrons (of mass m) coming out are v1 and v2 respectively , then then Two identical photocathodes receive light of frequencies f1 and f2 . If the velocities of the photoelectrons (of mass m) coming out are v1 and [...]