NUST entry test 2023 NET contains most of the Physics MCQs. FSC Part 1 physics book MCQs. HSSC physics questions MCQs. Solved Chapterwise physics MCQs for first-year 11 class MCQs. Second-year and first-year physic textbooks chapter-wise MCQs with the answer are provided here. PakLearningSpot PLS MCQs Bank website for FREE Entry test preparations
Debroglie wavelength for an electron and proton moving at same speed are L and 1; respectively. And frequencies are Fe and Fp respectively. Which of the following is corrract.
In E = aT4 E stands for??
Physics is an experimental science which depends heavily on:
NTS 2016 SMBBMC
Physics
Dawn of Modern Physics
Elimination Tool:
Which of following has greatest energy
Who was awarded Nobel Prize (1921) for explanation of Photoelectric Effect?
Anti matter theory was proposed by: a) Einstein b) Bohr
If temperature on Kelvin scale Is reduced to half, what would be the effect on the energy of radiations?
Plank׳s constant is analogus to:
PMC Sample 3
Physics
Dawn of Modern Physics
Elimination Tool:
A Black body is?
Which light photon has the least momentum?
PMC Practice 6
Physics
Dawn of Modern Physics
Elimination Tool:
The phenomena in which certain metals emit electrons when exposed to high-frequency light is known as?
NTS 2014
Physics
Dawn of Modern Physics
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Planck’s constant is analogous to:
PMC Practice 6
Physics
Dawn of Modern Physics
Elimination Tool:
In photo-emission from a metal, if light of λ is replaced by light of wavelength λ / 4 , the maximum kinetic energy of the photoelectrons.
UHS 2018
Physics
Dawn of Modern Physics
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Which of the following color has maximum energy?
Black body emits which of the following radiations:
The charge of a photon is:
PMC Sample 1
Physics
Dawn of Modern Physics
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What will be the energy of an X-ray quantum of wave length 1.0 x 10-10 m?
NTS 2016 SMBBMC
Physics
Dawn of Modern Physics
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Momentum of a photon is?
PMC Practice 2
Physics
Dawn of Modern Physics
Elimination Tool:
Which behaves as a particle as well as wave
Calculate the energy of a photon, with a frequency of 3.0 x 1018 Hz.
(h = 6.63 x 10-34)
UHS 2019
Physics
Dawn of Modern Physics
Elimination Tool:
Gamma-ray (?) can produce ionization in which of the following way/s?
I. It may lose all its energy in a single encounter with the electron of an atom (Photoelectric effect).
II. It may lose only a part of its energy in an encounter (Compton effect).
III. Very few of very high energy ? ray photons may impinge directly on heavy nuclei, be stopped and annihilated giving rise to electron-positron pairs (The materialization of energy).
NTS 2013
Physics
Dawn of Modern Physics
Elimination Tool:
The absolute standard of rest is:
Photoelectric effect is not produced by:
PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:
Which statement is universally correct?
What will the de Broglie wavelength of a 150 g mass moving with a velocity of 50 m/s be?
PMC 2021 Tested
Physics
Dawn of Modern Physics
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In Einstein’s theory, the deflection of light is predicted to be exactly as great as it is according to Newton’s theory
White light gives spectrum after undergoing:
PMC Sample 2
Physics
Dawn of Modern Physics
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Sunlight will emit photo electrons when striking which of the following
The de Broglie wavelength of an electron travelling with a speed of 1.0 x 107m/s is equal to, (h=6.6 x 10-34 Js and me= 9.1 x 10-31 kg)
UHS 2018
Physics
Dawn of Modern Physics
Elimination Tool:
Value of h Is:
Compton shift is maximum at:
PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:
Calculate the energy of a photon of wavelength 6600 Angstroms:
PMC Practice 5
Physics
Dawn of Modern Physics
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When photons are incident on a metal, electrons are emitted. The process is called:
NTS 2016 SMBBMC
Physics
Dawn of Modern Physics
Elimination Tool:
The energy of an X-ray quantum of wavelength 1.0 x 10-10 m is:
NTS 2012
Physics
Dawn of Modern Physics
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Which of the following waves has highest speed?
Photocell is similar to:
PMC Sample 2
Physics
Dawn of Modern Physics
Elimination Tool:
Which of the following Is correct?
According to Einstein, bodies and light rays follow a:
NUMS 2015
Physics
Dawn of Modern Physics
Elimination Tool:
Name the scientist who won the noble prize for discovery of energy quanta
A 5 watt LED bulb converts 80% of the power into light photons wavelength 660 nm. What is the number of photons emitted from the bulb in one second.
UHS 2018
Physics
Dawn of Modern Physics
Elimination Tool:
The Bohr’s postulate for stationary orbits of Hydrogen atoms _____. Here m is the mass of the electron, v velocity, r orbital, and h is Planck’s constant.
NTS 2019
Physics
Dawn of Modern Physics
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When an observer moves with velocity of light, relative to a timing device at rest, he would notice:
NUMS 2015
Physics
Dawn of Modern Physics
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The energy equivalent to 0.9 mg is? a) 9 x 1091 b) 8.1 x 10″J •
When an electron and its antiparticle positron come close enough to each other, they completely convert into radiation energy in the form of photons, this process is called:
NTS 2018
Physics
Dawn of Modern Physics
Elimination Tool:
Who proposed matter waves?
Gamma rays cause photoelectric emission when their energy is
Heisenberg uncertainty principle states:
Scattering of photon by electron is termed as:
The stopping potential depends on
The concept of work function was given by:
PMC Sample 2
Physics
Dawn of Modern Physics
Elimination Tool:
) Twin paradox Is consequence of?
In Heisenberg Principle:
Value of Wien’s constant is?
In Compton’s effect the wavelength of the scattered photon is
The number of LED segments used in a calculator display:
NUMS 2015
Physics
Dawn of Modern Physics
Elimination Tool:
Which group consists of only electromagnetic waves?
PMC Sample 1
Physics
Dawn of Modern Physics
Elimination Tool:
Fluorescence is produced when cathode rays strike on:
PMC 2021 Tested
Physics
Dawn of Modern Physics
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What would be Compton Wave shift if X-rays are scattered at an angle of 90 degree?
Electromagnetic wave theory was proposed by:
NTS 2015 SMBBMC
Physics
Dawn of Modern Physics
Elimination Tool:
The series limit for the Balmer series of hydrogen spectrum occurs at 3664 A. Calculate Ionization energy of hydrogen atom.
NTS 2013
Chemistry
Dawn of Modern Physics
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What will be the energy of electron travelling at 10^7 m/s
In order to produce pair production the minimum energy of photon required is:
NTS 2019
Physics
Dawn of Modern Physics
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Minimum frequency below which no electrons are emitted from the metal surface is called ______ frequency.
NTS 2016 DUHS & JSMU
Physics
Dawn of Modern Physics
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Candela is the luminous intensity, in the perpendicular direction of a surface _________ square meter of a black body at the temperature of freezing platinum under a pressure of 101325 newtons per square meter.
NTS 2013
Physics
Dawn of Modern Physics
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The existence of positron was discovered in the:
PMC Sample 3
Physics
Dawn of Modern Physics
Elimination Tool:
What will be the energy in Joules, when an electron acquires a speed of 10 m/s?
NTS 2016 DUHS & JSMU
Physics
Dawn of Modern Physics
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In the Compton Scattering experiment the X-ray wavelength change Δλ is ___________. Here h is Planck constant, m rest mass of electron and θ is angle after scattering.
NTS 2019
Physics
Dawn of Modern Physics
Elimination Tool:
Minimum energy required to eject an electron from metal surface is called:
UHS 2019
Physics
Dawn of Modern Physics
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The uncertainty in momentum and position is due to its:
PMC Sample 1
Physics
Dawn of Modern Physics
Elimination Tool:
Earth is a/an frame of reference
An electron moving with velocity v has momentum 3 x 10 -26 Kg.m/s. The de Broglie wavelength associated with it is ______. Value of h = 6.63 x 10-34 is.
NTS 2019
Physics
Dawn of Modern Physics
Elimination Tool:
The maximum Compton shift Is at
If frequency of incident light is increased beyond threshold frequency, keeping light intensity constant, then:
NUMS 2019 Reconduct
Physics
Dawn of Modern Physics
Elimination Tool:
The photocell is similar to:
PMC Practice 5
Physics
Dawn of Modern Physics
Elimination Tool:
Mass of a body with speed of light approaches to:
If Compton shift is half of Compton wavelength, then the scattering angle would be:
Who was awarded Nobel Prize (1921) for explanation of Photoelectric Effect?
A photosensitive material would emit electrons if it is excited by a photon beyond a threshold. To cross the threshold, what should be increased?
PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:
Einstein was given a Nobel prize for:
PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:
The electron shows purely a ____ when free.
PMC Sample 2
Physics
Dawn of Modern Physics
Elimination Tool:
The value and units of the Planck constant ‘h’ can be expressed as:
UHS 2019
Physics
Dawn of Modern Physics
Elimination Tool:
Black body radiations were first observed by:
theory of was Relativity proposed by
X-rays are used to investigate:
PMC Sample 3
Physics
Dawn of Modern Physics
Elimination Tool:
Light photons, each of energy 3.5 x 10-19J falls on the cathode of a photocell. The current through the cell is reduced to zero by taking the cathode to a potential +0.25 V relative to anode. The work function of the cathode is:
UHS 2018
Physics
Dawn of Modern Physics
Elimination Tool:
The spin of a photon is:
PMC 2021 Tested
Physics
Dawn of Modern Physics
Elimination Tool:
Presence of Photon was confirmed by
