Deck 23: Physics and Nuclear Science

Question 1

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 1

increases

Question 2

Energy of an electron in an atom is

A)quantized
B)continuous
C)radial
D)randomized

Answer 2

quantized

Question 3

In dark, LDR has

A)low resistance
B)high current
C)high resistance
D)both A and B

Answer 3

high resistance

Question 4

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

Question 5

Characteristic properties of waves are

A)reflection
B)refraction
C)interference
D)all of above

Question 6

Plank's constant has units {{}}

A)J
B)s
C)J s^-1
D)J s

Question 7

Gas atoms that exert negligible electrical forces on each other are

A)molecules
B)compounds
C)isotopes
D)isolated atoms

Question 8

Quantum of electromagnetic energy is called

A)particles
B)photons
C)waves
D)energy

Question 9

In photoelectric effect, electrons should be removed from the

A)inner shells
B)surface
C)from core
D)the nucleus

Question 10

Light interacts with matter as

A)wave
B)particle
C)both A and B
D)rays

Question 11

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

Question 12

Wavelength of ultraviolet region of electromagnetic spectrum is

A)121 nm
B)120 nm
C)119 nm
D)130 nm

Question 13

In an insulator, the valence band is

A)fully occupied
B)fully empty
C)half filled
D)half charged

Question 14

Number of protons in an atom determine

A)chemical properties
B)physical properties
C)magnetic properties
D)electrical properties

Question 15

In β+ decay, an UP quark becomes

A)a strange quark
B)a simple quark
C)a down quark
D)an anti-quark

Question 16

Most of the space in an atom is

A)filled with positive charge
B)empty
C)filled with negative charge
D)filled with neutrons

Question 17

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

Question 18

Neutrinos have electric charge of

A)zero
B)1
C)2
D)3

Question 19

β-radiations are simply {{}}

A)protons
B)neutrons
C)electrons
D)muons

Question 20

In a nuclear process, the quantity conserved is

A)mass-energy
B)momentum
C)mass only
D)energy only

Question 21

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

A)nucleons
B)nuclide
C)neutrino
D)nucleolus