Which of the following are mechanical waves?
Options
(a) Light waves (b) Sound waves (c) X-rays (d) Ratio waves
Correct Answer:
Sound waves
Explanation:
No explanation available. Be the first to write the […]
The wavelength of the matter wave is independent of
Options
(a) Mass (b) Velocity (c) Momentum (d) Charge
Correct Answer:
Charge
Explanation:
No explanation available. Be the first to write the explanation for […]
α-particles, deuterons and protons of same energy are moving in a perpendicular magnetic field. The ratio of diameters of their circular paths will be
Options
(a) (1:√2:1) (b) (√2:1:1) (c) (2:1:1) (d) (1:1:2)
When photons of energy hν are incident on the surface of photosensitive material of work function hν₀, then
Options
(a) The kinetic energy of all emitted electrons is hν₀ (b) The kinetic energy […]
The de-Broglie wavelength of neutron in thermal equilibrium at temperature T is
Options
(a) 30.8 / √T Å (b) 3.08 / √T Å (c) 0.308 / √T Å (d) 0.0308 / √T Å
The photoelectric threshold frequency of a metal is ν. When light of frequency 4ν is incident on the metal, the maximum kinetic energy of the emitted photoelectron is
Options
(a) 4hν (b) 3hν […]
The wavelength λₑ of an electron and λₚ of a photon are of same energy E are related by
Options
(a) λₚ ∞ λₑ (b) λₚ ∞ √λₑ (c) λₚ ∞ 1/√λₑ (d) […]
For photoelectric emission from certain metal the cut-off frequency is v. If radiation of frequency 2v impinges on the metal plate, the maximum possible velocity of the emitted electron will be (m is the electron […]
Two radiations of photons energies 1 eV and 2.5 eV, successively illuminate a photosensitive metallic surface of work function 0.5 eV. The ratio of the maximum speeds of the emitted electrons is:
Options
Maximum velocity of the photoelectrons emitted by a metal surface is 1.2×10⁶ ms⁻¹. Assuming the specific charge of the electron to be 1.8×10¹¹ C kg⁻¹, the value of the stopping potential in volt will be […]
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