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660+ A Level Physics Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .

Chapters

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Chapter: Quantum Physics
551.

When a charged particle is accelerated through a potential difference V, it's kinetic energy

A. decreases
B. remains same
C. increases
D. varies depending on resistance of wire
Answer» C. increases
discuss
552.

Energy of an electron in an atom is

A. quantized
B. continuous
C. radial
D. randomized
Answer» A. quantized
discuss
553.

In dark, LDR has

A. low resistance
B. high current
C. high resistance
D. both A and B
Answer» C. high resistance
discuss
554.

1 eV is equal to {{}}

A. 1.6 × 10 -19 J
B. 2.0 × 10 -20 J
C. 3 J
D. 4 J
Answer» A. 1.6 × 10 -19 J
discuss
555.

Electrons show diffraction effects because their de Broglie wavelength is similar to

A. spacing between atomic layers
B. no. of atomic layers
C. nature of atomic layers
D. positioning of atomic layers
Answer» A. spacing between atomic layers
discuss
556.

Characteristic properties of waves are

A. reflection
B. refraction
C. interference
D. all of above
Answer» D. all of above
discuss
557.

Plank's constant has units {{}}

A. J
B. s
C. J s-1
D. J s
Answer» D. J s
discuss
558.

Gas atoms that exert negligible electrical forces on each other are

A. molecules
B. compounds
C. isotopes
D. isolated atoms
Answer» D. isolated atoms
discuss
559.

Wavelength of red color is about {{}}

A. 7 × 10-7 m
B. 7 × 107 nm
C. 4 × 10-7 m
D. 4 × 10-7 nm
Answer» A. 7 × 10-7 m
discuss
560.

Quantum of electromagnetic energy is called

A. particles
B. photons
C. waves
D. energy
Answer» B. photons
discuss
561.

In photoelectric effect, electrons should be removed from the

A. inner shells
B. surface
C. from core
D. the nucleus
Answer» B. surface
discuss
562.

Light interacts with matter as

A. wave
B. particle
C. both A and B
D. rays
Answer» B. particle
discuss
563.

When white light is passed through cool gases, the spectra observed is called

A. line spectra
B. continuous spectra
C. emission line spectra
D. absorption line spectra
Answer» D. absorption line spectra
discuss
564.

Wavelength of ultraviolet region of electromagnetic spectrum is

A. 121 nm
B. 120 nm
C. 119 nm
D. 130 nm
Answer» A. 121 nm
discuss
565.

In an insulator, the valence band is

A. fully occupied
B. fully empty
C. half filled
D. half charged
Answer» A. fully occupied
discuss
566.

Most energetic photons are

A. alpha
B. beta
C. gamma
D. x-rays
Answer» C. gamma
discuss
Chapter: Radioactivity
567.

Radius of nucleus ranges from {{}}

A. 10-15 m
B. 10-15 m to 10-14 m
C. 10-10 m
D. 10-10 m to 10-6 m
Answer» B. 10-15 m to 10-14 m
discuss
568.

Number of protons in an atom determine

A. chemical properties
B. physical properties
C. magnetic properties
D. electrical properties
Answer» A. chemical properties
discuss
569.

In β+ decay, an UP quark becomes

A. a strange quark
B. a simple quark
C. a down quark
D. an anti-quark
Answer» C. a down quark
discuss
570.

Most of the space in an atom is

A. filled with positive charge
B. empty
C. filled with negative charge
D. filled with neutrons
Answer» B. empty
discuss
571.

A proton is made up of

A. one up quark and two down quarks
B. an up quark and down antiquark
C. two up quarks and a down quark
D. strange quark and an anti-strange quark
Answer» C. two up quarks and a down quark
discuss
572.

Neutrinos have electric charge of

A. zero
B. 1
C. 2
D. 3
Answer» A. zero
discuss
573.

β-radiations are simply {{}}

A. protons
B. neutrons
C. electrons
D. muons
Answer» C. electrons
discuss
574.

In a nuclear process, the quantity conserved is

A. mass-energy
B. momentum
C. mass only
D. energy only
Answer» A. mass-energy
discuss
575.

A specific combination of protons and neutrons in a nucleus is called

A. nucleons
B. nuclide
C. neutrino
D. nucleolus
Answer» B. nuclide
discuss
576.

In β + decay, the nucleon number is

A. conserved
B. not conserved
C. unstable
D. stable
Answer» A. conserved
discuss
577.

Particles that are un affected by strong nuclear force are

A. protons
B. leptons
C. neutrons
D. bosons
Answer» B. leptons
discuss
578.

Number of isotopes neon has is

A. 2
B. 4
C. 3
D. 5
Answer» C. 3
discuss
579.

Phenomena of radioactivity was discovered by Henri Becquerel in

A. 1896
B. 1895
C. 1894
D. 1893
Answer» A. 1896
discuss
580.

Radiations emitted by radioactive substances is

A. alpha
B. beta
C. gamma
D. all of above
Answer» D. all of above
discuss
581.

Elements undergo radioactive decay when proton number becomes greater than

A. 50
B. 40
C. 83
D. 73
Answer» C. 83
discuss
582.

Process in which α and β rays pass close to atoms and knock electrons out is called

A. atomization
B. ionization
C. decay
D. hydroxylation
Answer» B. ionization
discuss
583.

Alpha particles have relatively

A. low kinetic energies
B. high potential energy
C. high mechanical energy
D. high kinetic energy
Answer» D. high kinetic energy
discuss
584.

Strongest ionizing radiation is

A. Alpha
B. beta
C. gamma
D. x-rays
Answer» A. Alpha
discuss
585.

The nucleon number consists of

A. Number of electrons
B. Number of protons
C. Number of electrons and protons
D. Number of protons and neutrons
Answer» D. Number of protons and neutrons
discuss
586.

Gamma radiation is emitted in order to

A. excite the atom
B. release excess energy from atom
C. destabilize the atom
D. stabilize the atom
Answer» B. release excess energy from atom
discuss
587.

Electrons move around nucleus in form of

A. clouds
B. dust particles
C. steam
D. charge
Answer» A. clouds
discuss
588.

Particles like kaons and muons etc, were found out by

A. looking at cosmic rays
B. looking at particles in accelerators
C. looking closely at atom
D. both A and B
Answer» D. both A and B
discuss
589.

Type of rays that affect the nucleus are

A. alpha
B. beta
C. gamma
D. EM
Answer» A. alpha
discuss
590.

Force that acts on both quarks and leptons is

A. strong nuclear force
B. weak interaction
C. intermediate interaction
D. nuclear force
Answer» B. weak interaction
discuss
591.

Particles that experience strong force are

A. leptons
B. hadrons
C. both A and B
D. softons
Answer» B. hadrons
discuss
592.

Heavy nuclei have

A. more protons than neutrons
B. more electrons than neutrons
C. more neutrons than electrons
D. more neutrons than protons
Answer» D. more neutrons than protons
discuss
593.

The strong nuclear force acts over the distance

A. 10-13 m
B. 10-14 m
C. 10-15 m
D. 10-16 m
Answer» B. 10-14 m
discuss
594.

A decay in which a proton decays in to neutron and an electron neutrino is

A. β+ decay
B. β-
C. γ decay
D. α decay
Answer» B. β-
discuss
595.

Photon of electromagnetic radiation is

A. α ray
B. β ray
C. γ ray
D. x-ray
Answer» C. γ ray
discuss
596.

Mass of alpha particle is

A. 50 times the mass of electron
B. 100 times the mass of electron
C. 500 times the mass of electron
D. 1000 times the mass of electron
Answer» D. 1000 times the mass of electron
discuss
597.

Particle which explains about mass of matter is called

A. Higgs boson
B. protons
C. leptons
D. neutrons
Answer» A. Higgs boson
discuss
598.

Plum pudding model describes atom as

A. negative pudding with positive plums
B. negative pudding
C. positive pudding with negative plums
D. positive pudding only
Answer» C. positive pudding with negative plums
discuss
599.

Lepton among them are

A. electrons
B. neutrinos
C. protons
D. both A and B
Answer» D. both A and B
discuss
600.

Density of proton is equal to density of

A. electron
B. atom
C. neutron
D. neutrino
Answer» C. neutron
discuss

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