A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is 4×10⁻³ Wb. The self-inductance of the solenoid […]
Which phenomenon best supports the theory that matter has a wave nature?
Options
(a) Electron momentum (b) Electron diffraction (c) Photon momentum (d) Photon diffraction
Correct Answer:
Electron diffraction
Explanation:
Wave nature of matter […]
The threshold wavelength for photoelectric emission from a material is 4800 Å. Photoelectrons will be emitted from the material, when it is illuminated with light from a
Options
(a) 40 W blue lamp […]
If an electron and a proton have the same de-Broglie wavelength, then the kinetic energy of the electron is
Options
(a) More than that of a proton (b) Equal to that of a […]
The maximum kinetic energy of emitted electrons in a photoelectric effect does not depend upon
Options
(a) Intensity (b) Work function (c) Wavelength (d) Frequency
Correct Answer:
Intensity
Explanation:
The maximum kinetic energy = […]
When a piece of metal is illuminated by a monochromatic light of wavelength λ, then stopping potential is 3Vs. When same surface is illuminated by light of wavelength 2λ, then stopping potential becomes Vs. The […]
In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of
Options
(a) Collisions between the charged paricles emitted from the cathode […]
Photon of frequency ν has a momentum associated with it. If c is the velocity of light, the momentum is
Options
(a) hν/c (b) ν/c (c) hνc (d) hνc²
Correct Answer:
hν/c
Explanation: […]
What is the energy of He⁺ electron in first orbit?
Options
(a) (40.8 eV) (b) (-52.2 eV) (c) (-54.4 eV) (d) (-13.6 eV)
Correct Answer:
(-54.4 eV)
Explanation:
No explanation available. Be the […]
If h is Planck’s constant, the momentum of a photon of wavelength 0.01 Å is
Options
(a) 10⁻² h (b) h (c) 10² h (d) 10¹² h
Correct Answer:
10¹² h
Explanation:
No […]
2017-2025 Copyright Doctor Dreams Training Academy - About Us - Privacy Policy - Terms & Conditions - Contact Us - Refund Policy