Electronn MCQ 2

What is the formula for the energy of a photon?

What is the work function of a metal in terms of Planck's constant and the threshold frequency?

What is the maximum velocity of an emitted electron in terms of Planck's constant, the frequency of the incident EM wave, and the work function of the metal?

What is the energy conversion of a charged particle in an electric field?

What is the formula for the energy of a charged particle in an electric field?

What is the energy of an electron emitted from a metal surface, given that its maximum velocity is v_max and the work function of the metal is ϕ?

What is the force exerted on an object moving in a circular path, given its mass, velocity, and radius of the circular path?

A photon has an energy E. What is its frequency, given Planck's constant h?

A charged particle is accelerated through a potential difference V. What is its gain in kinetic energy, given its charge q and final velocity v?

What is the energy of an electron in an electric field, given its charge q and the voltage V?

Work Function and Photoelectric Effect

The work function (ϕ) of a metal is the minimum energy required to eject an electron from the metal's surface, and it is related to the threshold frequency (f_0) by the equation ϕ = hf_0.
The photoelectric law states that the energy of the incident photon (hf) is equal to the work function (ϕ) plus the maximum kinetic energy of the emitted electron (1/2 m〖v_max〗^2).

Energy of a Photon

The energy of a photon (E) is directly proportional to its frequency (f) and is given by the equation E = hf.

Centripetal Force

Centripetal force (F) is the force required to keep an object moving in a circular path, and it is given by the equation F = (mv^2)/r, where m is the mass of the object, v is its linear velocity, and r is the radius of the circle.

Energy Conversion of a Charged Particle

The energy conversion of a charged particle in an electric field is given by the equation qV = 1/2 mv^2, where q is the charge of the particle, V is the voltage through which the particle is accelerated, m is the mass of the particle, and v is its velocity.
The energy of a charged particle in an electric field is given by the equation E = qV, where E is the energy, q is the charge, and V is the voltage.

Test your understanding of the photoelectric effect, work function, energy of a photon, and energy conversion in various scenarios. Explore concepts like threshold frequency, maximum velocity of emitted electrons, and centripetal force in this quiz.