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Quiz 76
Mdcat-past-papers Quiz
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1501. Somatic effect causes:
Gene deformation
Chromosomes deformation
Skin burns
Eye burns
1502. Each person experiences the background radiation dose in one year:
1 mSv
1 mGy
1 Gy
1 Sv
1503. The force responsible for binding the nucleus:
Coulomb's force
Weak nuclear force
Newton force
Strong nuclear force
1504. Leptons are the group of particles which are:
Less massive than the lightest hadrons
More massive than the lightest hadrons
Less massive than the heaviest hadrons
More massive than the heaviest hadrons
1505. A meson consists of a:
Quark and an antiquark
Only quarks
Anti-quarks
Quark and hadrons
1506. Proton is made up of ----- quarks:
1 up, 2 down
2 up, 1 down
2 up, 2 down
1 up only
1507. What is the value of up quark?
0.666666667
0.333333333
-0.666666667
-0.333333333
1508. Number of quarks in hydrogen atom are:
1
3
5
7
1509. Number of quarks are:
2
4
6
8
1510. If electron, proton, neutron, and alpha particle have same velocity, which of them has shortest wavelength?
Electron
Proton
Neutron
Alpha particle
1511. The process of ejection of loosely bound electrons from a certain photo sensitive surface by absorption of photon is called:
Compton effect
Photoelectric effect
Pair production
Black body radiation
1512. In photoelectric effect experiment, the stopping potential is:
The kinetic energy of the most energetic electron ejected
The potential energy of the most energetic electron ejected
The photon energy
The electric potential that causes the electron current to vanish
1513. The line spectrum of hydrogen atom contains the spectral lines in the region of:
Ultraviolet
Infrared
Visible
All of these
1514. The speed of electron in the first Bohr orbit is:
2.19 × 10⁶ ms⁻¹
2.19 × 10⁶ ms
2.19 × 10⁴ ms⁻¹
2.19 × 10⁻⁴ ms⁻¹
1515. The process of ejection of loosely bound electrons from a certain photo sensitive surface by absorption of photon is called?
Compton effect
Photoelectric effect
Pair production
Black body radiation
1516. In Compton effect, a photon of a certain wavelength collides with a stationary electron. The wavelength of the emitted photon is:
Longer
Same
Shorter
Infinite
1517. The Balmer series of hydrogen is important because it:
Only series that occurs for hydrogen
Is in the visible region
Is of lowest possible quantum number
Greater energy
1518. In Compton effect, the incident photon when compared to the scattered photon is of:
Greater energy and momentum
Greater frequency
Greater energy
Equal energy
1519. Which of the following is the longest wavelength of radiation for the Paschen series?
187000000 m
0.00000187 m
187000000/m
0.00000187 /m
1520. The kinetic energy of an electron in first Bohr radius of H-atom is:
13.6 eV
13.6 KeV
-13.6 eV
13.6 eV
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