An art infused learning platform
Light of frequency 1.5 times the threshold frequency Question :- A light of frequency 1.5 times the threshold frequency is incident on photo-sensitive material. If the frequency is halved and intensity is doubled, the photoelectric current becomes (A) quadrupled (B) doubled (C) halved (D) zero Solution :- Given that light of frequency 1.5 times…
Read More “Light of frequency 1.5 times the threshold frequency” »
Consider the spring-mass system, with the mass submerged in water as shown in the figure Question :- Consider the spring-mass system, with the mass submerged in water as shown in the figure. If mass is released with spring at natural length, then momentum-position diagram for one cycle of this system is (take down direction…
A particle rests in equilibrium under two forces of repulsion whose centres are at a distance of a and b from the particle. Question :- A particle rests in equilibrium under two forces of repulsion whose centres are at a distance of a and b from the particle. The forces vary as the cube of the distance. The…
विद्युत सेल किसे कहते हैं ? विद्युत सेल किसे कहते हैं ? वह युक्ति जिसके द्वारा रासायनिक ऊर्जा को विद्युत ऊर्जा में रूपांतरित किया जाता है विद्युत सेल कहलाती है। प्रत्येक सेल में धनाग्र व ऋणाग्र दो इलेक्ट्रोड होते हैं, जिन्हें क्रमशः एनोड व कैथोड कहते हैं। सेल में विद्युत अपघट्य होता है जिसमें…
Cube Resistance Problem | JEE Main | JEE Advanced Cube Resistance Problem | JEE Main | JEE Advanced :- For a cube having equal resistance along its edges, let’s determine the equivalent resistance between :- Two vertices along the body diagonal Two vertices along the face diagonal Two adjacent vertices Equivalent resistance…
Read More “Cube Resistance Problem | JEE Main | JEE Advanced” »
Davisson and Germer Experiment The Davisson and Germer experiment was a 1923-27 experiment performed by Clinton Davisson and Lester Germer to establish the wave nature of slow moving electrons. This confirmed the de-Broglie hypothesis of wave-particle duality. Experimental setup of Davisson and Germer Experiment The Davisson and Germer experiment is contained in a vacuum chamber…
Radiation Pressure Radiation Pressure :- Maxwell predicted that an electromagnetic wave carries momentum() and energy() and when this electromagnetic wave is absorbed/reflected by a surface, it would experience a force in a direction perpendicular to the surface. Maxwell’s prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures using…
A light beam of wavelength 400 nm is incident on a metal plate of work function 2.2 eV. A particular electron absorbs a photon and makes two collisions before coming out of the metal. Assuming that 10% of the extra energy is lost to the metal in each collision, find the kinetic energy of this…
An ultraviolet light of wavelength 2000 angstrom causes photo emission from a surface. The stopping potential is 2 volt. Find the work function in electron volt and the maximum speed of the ejected photoelectrons. An ultraviolet light of wavelength 2000 angstrom…… :- Solution :- Using Einstein photoelectric equation, Now, as ⇒ vmax = 8.4…
Read More “An ultraviolet light of wavelength 2000 angstrom” »
A photon with energy of 4.9 eV ejects photoelectrons from tungsten. When the ejected electron enters a constant magnetic field of strength B = 2.5 mT at an angle of 60∘ with the field direction, the maximum pitch of the helix described by the electron is found to be 2.7 mm. Find the work function…
Read More “A photon with an energy of 4.9eV ejects photoelectrons from tungsten” »