1. Mechanics
    2. 1. Units, Dimensions and Errors
    2. Vectors and Scalars
    3. Motion in a Straight Line
    4. Projectile Motion
    5. Newton's Laws of Motion
    6. Friction
    7. Work, Energy, Power and Collision
    8. Circular motion
    9. Rotational motion
    10. Simple Harmonic Motion
    11. Gravitation
    12. Elasticity
    13. Surface Tension
    14. Fluid dynamics and Viscosity
    15. Hydrostatics
  2. Heat and Thermodynamics
    3. 16. Thermometry
    17. Thermal expansion
    18. Calorimetry, Change of State and Hygrometry
    19. Gas Laws and Kinetic theory of Gases
    20. Transmission of Heat
    21. Thermodynamics
  3. Sound and Waves
    4. 22. Wave
    23. Superposition of Waves
    24. Stationary/ Standing waves
    25. Doppler's effect and Musical sound
  4. Optics
    5. 26. Reflection of Plane and Curved Mirrors
    27. Refraction at Plane surfaces and Total internal reflection
    28. Refraction through prism and Dispersion of Light
    29. Refraction through Lenses
    30. Chromatic abberation in Lenses, Optical instruments and Human eye
    31. Velocity of Light
    32. Photometry
    33. Wave nature of Light
  5. Electrostatics
    6. 34. Charge and Force
    35. Electric Field and Potential
    36. Capacitance
  6. Electrodynamics
    7. 37. Electric current
    38. Heating Effect of Current
    39. Thermoelectricity
    40. Chemical effect of Current
    41. Meters
  7. Electromagnetism
    8. 42. Properties of Magnets
    43. Magnetic effects of Current
    44. Electromagnetic induction
    45. Alternating current
  8. Modern Physics
    9. 46. Cathode rays, Positive rays and Electrons
    47. Photoelectric effect
    48. X-rays
    49. Atomic structure and Spectrum
    50. Radioactivity
    51. Nuclear physics
    52. Semiconductor and Semiconductor devices
    53. Diode and Triode valves
    54. Logic gates
    55. Relativity and Universe
    56. Particle physics
Modern Physics
51. Nuclear physics
1. When a particles and its antiparticle are annihilated the energy released is E what is the mass of each particle?

[MOE 2012 & 2013]

  • E/c2
  • 2E/c2
  • E2/c
  • E/c
2. Which of the following is correct representation of a nuclear reaction (notation carry usual meanings)?

[MOE 2068]

  • AZX → A-4Z-2Y + 42He
  • AZX → AZ+1Y + 0-1e
  • AZX → AZ-1Y + 01e
  • AZX → AZY + γ
3. Correct decay scheme for an emission of β- emission from a radioactive nuclear AZX may be

[MOE 2010]

  • AZX → AZ+1Y + 0-1e
  • AZX → AZ-1Y + 01e
  • AZX → AZY-1 + 0-1e
  • AZX → AZX+ + 0-1e
4. A nucleus AZX decays to AZ-1Y plus an additional nuclear particle. The resulting particle may be

[MOE 2009]

  • Positron
  • Alpha
  • Beta
  • Gamma
5. The fusion of hydrogen into helium is more likely to take place:

[KU 2011/2017]

  • at high temp & high pressure.
  • at high temp & low pressure
  • at low temp & low pressure.
  • at low temp & high pressure.
6. Energy is radiated in which of the following?

[KU 2010]

  • Nuclear fusion
  • Nuclear fission
  • Thermo-chemical reaction
  • Chemical reaction
7. Positron has

[KU 2010]

  • no charge and spin:
  • has some mass & some charge.
  • no mass, and spin.
  • has some mass but no charge.
8. The quark combination of proton is

[KU 2010]

  • uud
  • udd
  • uuu
  • ddd
9. Which is emitted in β-emission?

[BP 2012]

  • Only e-
  • Only helium nucleus
  • Both e- & He nucleus
  • None
10. The average distance between nucleus & electron is

[BP 2012]

  • 10-8 cm
  • 10-10 cm
  • 10-12 cm
  • 10-15 cm
11. Which of the following has similar mass to electron?

[T.E. 2009]

  • proton
  • neutron
  • positron
  • neutrino
12. The binding energy of hydrogen atom is

[I.E. 2009]

  • 1.0 eV
  • 13.6 eV
  • -13.6 eV
  • 0
13. The nuclear radius of nucleus with nucleon number 16 is 3×10-15 m. With nucleon number 128, radius is

[I.E. 2009]

  • 3×10-15 m
  • 6×10-15 m
  • 1.5×10-15 m
  • 4.5×10-15 m
14. In fusion, % of mass converted into energy is about

[I.E. 2009]

  • 0.01%
  • 0.1%
  • 1%
  • 10%
15. n = p + e + X, where n = neutron, p is proton, e is electron. What is X?

[I.E. 2013]

  • neutrino
  • antineutrino
  • proton
  • meson
16. Find out the no. of neutrons released in the fission of 235U into 144Xe and 90Sr.

[I.E. 2010]

  • 1
  • 2
  • 3
  • 0
17. The neutron possesses

[I.E. 2010]

  • no charge no spin.
  • electronic charge and spin.
  • no charge but has mass equal to that of proton.
  • spin but no charge.
18. The energy released in the fission of one nucleus is 200 MeV. The number of fissions per second required to produce 3.2 W of power is

[I.E. 2010]

  • 107
  • 1010
  • 1015
  • 1017
19. Following revolves around the nucleus.

[I.E. 2012]

  • proton
  • electron
  • neutron
  • none
20. Nucleon is

[I.E. 2012]

  • electron and proton
  • proton and nucleus
  • Proton and neutron
  • none
21. In nuclear reactor, cadmium rod is used as

[BP 2014]

  • moderator
  • Nuclear fuel
  • Coolant
  • Control rod
22. The packing fraction for 14N isotope, whose mass is 14.003 amu is

[BP 2014]

  • 3 × 10-3
  • 2.1 × 10-3
  • 1.00002
  • 0.9
23. The binding energies per nucleon for a deuteron and an α-particle are x1 and x2 respectively. What will be energy Q released in the reaction: (1H2 + 1H2 → 2He4 + Q)

[BP 2014]

  • 4 (x1 + x2)
  • 2 (x2 - x1)
  • 4 (x2 - x1)
  • 2 (x1 + x2)
24. The mass defect for the nucleus of helium is 0.0303 amu. What is the binding energy per nucleon for helium in MeV?

[BP 2014]

  • 7
  • 14
  • 28
  • 27
25. A nucleus of 210Po originally at rest emits an α-particle with speed v. What will be recoil speed of the daughter nucleus?

[BP 2014]

  • 4v/206
  • 4v/214
  • v/206
  • v/214
26. Energy released in the fission of a single 235U nucleus is 200 MeV. The fission rate of a 235U-filled reactor operating at a power level of 5 W is

[BP 2014]

  • 1.56 × 1010 s-1
  • 1.56 × 1011 s-1
  • 1.56 × 10-16 s-1
  • 1.56 × 10-17 s-1
27. The nuclear radius of a nucleus with nucleon number 16 is 3 × 10-15 m. With nucleon number 128, radius would be

[BP 2014]

  • 3 × 10-15 m
  • 6 × 10-15 m
  • 1.5 × 10-15 m
  • 4.5 × 10-15 m
28. The ratio of the radii of the nuclei 27Al and 125Te is approximately

[BP 2014]

  • 6:10
  • 13:52
  • 40:17
  • 27:125
29. If the mass defect in the formation of helium from hydrogen is 0.5%, then the energy obtained in kWh, in forming helium from 1 kg of hydrogen will be

[BP 2014]

  • 1.25 × 107
  • 125 × 104
  • 1.25 × 104
  • 1.25 × 1010
30. The binding energies per nucleon of 7Li and 4He are 5.6 MeV and 7.06 MeV respectively, then the energy of the reaction 7Li + p → 2[4He] will be

[BP 2014]

  • 17.28 MeV
  • 1.46 MeV
  • 28.24 MeV
  • 39.2 MeV
31. The binding energy of two nuclei P and Q are x joule and y joule respectively. If 2x > y, then the energy released in the reaction P + P → Q will be

[BP 2014]

  • 2x - y
  • 2x + y
  • x + y
  • xy
32. A nucleus ruptures into two nuclear parts which have their velocity ratio equal to 2:1. What will be the ratio of their nuclear radius?

[BP 2014]

  • 21/3:1
  • 1:2
  • 31/2:1
  • 1:3
33. The binding energy per nucleon of deuteron (2H) and helium (4He) is 1.1 MeV and 7 MeV respectively. If two deuterons fuse to form a single helium atom, then the energy released is

[BP 2014]

  • 23.6 MeV
  • 13.9 MeV
  • 26.9 MeV
  • 19.2 MeV
34. Two deuterons each of mass m fuse to form helium resulting in release of energy E. The mass of helium formed is

[BP 2014]

  • 2m - E/c2
  • m + E/c2
  • 2m + E/c2
  • E/mc2
35. The nuclei of which one of the following pairs of nuclei are isotones?

[BP 2014]

  • 34Se, 36S
  • 38Sr, 18Ar
  • 42Mo, 40Zr
  • 20Ca, 16S
36. Consider the nuclear reaction X200 → A100 + B100 + Energy. If the binding energy per nucleon for X, A and B is 7.4 MeV, 8.2 MeV and 8.2 MeV respectively, what is the energy released?

[BP 2014]

  • 160 MeV
  • 200 MeV
  • 110 MeV
  • 90 MeV
37. A gamma ray photon creates an electron-positron pair. If the rest mass of electron is 0.51 MeV and the total kinetic energy of electron-positron pair is 0.78 MeV, the energy of gamma ray photon must be:

[BP 2014]

  • 1.78 MeV
  • 0.78 MeV
  • 1.28 MeV
  • 0.28 MeV
38. To produce proton-antiproton pair, the minimum energy of γ-rays photon must be

[BP 2014]

  • 1862 MeV
  • 2 MeV
  • 931 MeV
  • 1 MeV
39. The minimum energy needed to break C12 into three α-particles: mass of C12 = 12.000 and mass of α-particle = 4.0038

[BP 2014]

  • 7.27 MeV
  • 1.06 MeV
  • 5.3 MeV
  • 3.53 MeV
40. Two nucleons are at a separation of 1 fm. The net force between them is F1 if both are neutrons, F2 if both are protons and F3 if one is proton and the other is a neutron.

[BP 2014]

  • F1 = F3 > F2
  • F1 > F2 > F3
  • F2 > F1 > F3
  • F1 = F2 > F3
41. In the nucleus of 23Na11, the number of protons, neutrons and electrons is

[BP 2014]

  • 11, 12, 0
  • 23, 12, 11
  • 12, 11, 0
  • 23, 11, 12
42. In the nuclear reaction 10B + 4He → 13N + X, the missing term is a

[BP 2014]

  • neutron
  • proton
  • electron
  • α-particle
43. In the nuclear reaction 12C → 12B + β+ + X, what does X stand for?

[BP 2014]

  • neutrino
  • proton
  • electron
  • neutron
44. A nucleus AXZ emits one alpha particle and two β-particles. The resulting nucleus is

[BP 2014]

  • A-4YZ-2
  • A-4YZ
  • AYZ
  • AYZ-2
45. The mass of a proton is 1.007825 u and mass of neutron is 1.008665 u, then the binding energy per nucleon is 35Cl if its mass is 34.980 u is:

[BP 2014]

  • 8.2 MeV
  • 4.1 MeV
  • 16 MeV
  • 8.2 keV
46. A nucleus with mass number 200 initially at rest emits an alpha particle. If the Q of the reaction is 5.5 MeV, Calculate the K.E. of the α-particle

[BP 2014]

  • 5.4 MeV
  • 4.4 MeV
  • 5.6 MeV
  • 6.5 MeV
47. The radius of Al nucleus, in fermi, is nearly

[MOE Curriculum]

  • 3.6 fm
  • 1.5 fm
  • 2.5 fm
  • 13.5 fm
48. The approx radius of nucleus of Cu in fermi is

[MOE 2008]

  • 4.5 fm
  • 1.5 fm
  • 2.5 fm
  • 6 fm
49. The radius of gold nucleus is approximately

[MOE 2065]

  • 6.0×10-15 m
  • 4.29×10-15 m
  • 1.5×10-15 m
  • 2.5×10-15 m
50. A positron has the same mass as

[MOE 2063]

  • an electron
  • neutron
  • neutrino
  • a proton
51. Radius of Al (At wt = 27) nucleus in fermi is

[MOE 2056]

  • 3.6 fm
  • 1.5 fm
  • 2.5 fm
  • 10 fm
52. Binding energy per nucleon is highest for the atom

[T.E. 2006]

  • Fe
  • 4He
  • Cd
  • U
53. Neutrino is a particle which has

[T.E. 2004]

  • spin and charge less
  • No spin and charge less
  • spin and charged like electron
  • No spin and charge like electrons
54. When fuel of the star exhausts

[BPKIHS 2002]

  • temperature increases and size decreases
  • temperature decreases and size increases
  • temperature and size both increase
  • the star blasts off
55. According to Standard Model, spin half particles are known as

[KU 2015]

  • Fermion
  • Bosons
  • Photons
  • None
56. The sun radiates energy in all directions. The average radiation received on the earth's surface from the sun per second is 1.4 kW/m². The average sun-earth distance is 1.5×1011 m. The mass lost by the sun per day is

[KU 2015]

  • 3.8×1014 kg
  • 3.8×1010 kg
  • 4.4×109 kg
  • 7.6×108 kg
57. The source of energy of sun is

[KU 2016]

  • Nuclear fusion
  • Nuclear fission
  • Geothermal
  • Radioactivity