(A) 0.041 eV
(B) 0.41 eV
(C) 4.1 eV
(D) 41 eV
Category: Physics Mcqs
Physics Mcqs for NTS, PPSC, FPSC, CSS, PMS, Educators, SPSC, Lecturer, BPSC, AJKPSC, PTS, PST, EST, SST and all other exams. Users will find mcqs related to mechanics, Thermodynamics, Photonics, study of heat, Distance, work, force, time, machines, study of electricity, magnetism, law of motion, nuclear physics, Quantum, relativity, solar system, and all the topics will be covered in the physics mcqs section.
Photoelectric effect is the phenomenon in which:
(A) Photons come out of a metal when it is hit by a beam of electrons
(B) Photons come out of the nucleus of an atom under the action of an electric field
(C) Electrons come out of a metal with a constant velocity which depends on the frequency and intensity of incident radiation
(D) Electrons come out of a metal with different velocities not greater than a certain value which depends only on the frequency of the incident light and not on its intensity
A photon of energy 3.4 eV is incident on a metal having work function 2 eV. The maximum kinetic energy of photoelectrons is equal to:
(A) 1.4 eV
(B) 1.7 eV
(C) 5.4 eV
(D) 6.8 eV
X-rays of wavelength 22 pm are scattered from a carbon target. The scattered radiation being viewed at 60° to the incident beam. What is Compton shift?
(A) 1.21 Pm
(B) 0.51 Pm
(C) 2.43 Pm
(D) None
In a half rectification, diode conducts during:
(A) both half cycles
(B) positive half
(C) negative half
(D) one half input
Common type of rectification is:
(A) half wave rectification
(B) quarter wave rectification
(C) full wave rectification
(D) both A and B
In half-wave rectification, during negative cycle of wave, diode is:
(A) reverse biased
(B) forward biased
(C) potential barrier
(D) both a and b
The method by which both half of A.C cycle is converted in to direct current is called:
(A) half wave amplification
(B) full wave rectification
(C) half wave rectification
(D) full wave amplification