NMDCAT Quiz-Physics
NMDCAT Physics Quiz
Welcome to the NMDCAT Physics Quiz! Designed to test your knowledge of key concepts surrounding linear momentum, the photoelectric effect, and quantum mechanics, this quiz provides a comprehensive overview of essential physics topics that are crucial for aspiring medical students.
Prepare yourself with questions that cover:
- Photon properties and behaviors
- Photoelectric effect fundamentals
- Electromagnetic radiation basics
- Quantum mechanics principles
1-Linear momentum of a photon is:
Zero
Hf/c
Hf/c2
C2/hf
2-Stopping potential for a metal surface in case of photoelectric emission depends upon:
The threshold frequency for the metal surface
The intensity of incident light
The frequency of incident light and the work function for metal surface
The threshold energy for the metal surface
3-Rest mass of photon is:
Infinite
Very small
Zero
Very large
4-A photon is a:
Unit of energy
Quantum of electromagnetic radiation energy
Positively charged particle
Unit of wavelength
5-which one of the following has high energy content?
Gamma rays
X-rays
Infrared rays
UV rays
6-The reverse of photoelectric is:
Compton effect
Annihilation
Pair-production
X-rays production
7-The stopping potential when intensity is kept constant is:
Same
Different
May be same or different
Independent of frequency of incident light
8-Photon A has twice the energy of photon B. What is the ratio of the momentum of A to that of B?
4:1
1:2
2:1
1:4
9-Number of photoelectrons emitted from metal depends upon:
Intensity of incident light
Wavelength of incident light
Energy of incident light
Frequency of incident light
10-Which physical quantity will change if intensity of light falling on metal surface is increased?
K.E of photoelectrons
Plate potential
Velocity of photoelectrons
Current
11-The Davisson and Germer experiment indicates:
Interference
Electron diffraction
Polarization
Refraction
12-Rank following electromagnetic radiations according to the energies of their photons, from least to greatest:1-blue light 2-yellow light 3-x-rays 4-radio waves
1<2<3<4
4<1<2<3
4<2<1<3
3<2<1<3
13-In a photoelectric experiment, the stopping potential is:
The energy required to remove an electron from the sample
The kinetic energy of the most energetic electron ejected
The potential energy of the most energetic electron ejected
The electric potential that causes the electron current to vanish
14-Of the following, which is the best evidence for the wave nature of matter?
The photoelectric effect
The Compton effect
The relationship between momentum and energy for an electron
The diffraction of electrons by crystals
15-In a photoelectric effect experiment, at a frequency above cut off, the stopping potential is proportional to:
The energy of the least energetic electron before is is ejected
The energy of the least energetic electron after it is ejected
The energy of the most energetic electron before it is ejected
The energy of the most energetic electron after it is ejected
16-The shortest wavelength radiation in Bracket series has wavelength:
16/ Rydburg's constant
Rydburg's constant/16
16 x Rydburg's constant
4/Rydburg's constant
17-Ground state energy of Hydrogen atom is:
Zero
13.6 eV
3.45 eV
-13.6 eV
18-The relation between Rydberg constant R (H) and ground state energy Eo is given by:
R (H) =Eo/hc
Eo = R (H) / hc
R (H) =hc/Eo
R (H) =Eohc
19-A non relativistic free electron has kinetic energy "K". If its wavelength doubles, its kinetic energy is:
4K
K/2
2K
K/4
20-The life time of an electron in an excited state is about 10^-8 seconds. What is its uncertainty in energy during this time?
1.05 x 10^-26 J
1.15 X 10^10 J
1.05 X 10^26
1.15 X 10^-10
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