2nd Year Physics Full Book Paper

Q1. Multiple choice questions (Attempt all · 17 × 1 = 17)

1. Artificial satellites are used for:
   1. Communication
   2. Military operations
   3. Scientific research
   4. All of the above
2. Statistical mechanics connects microscopic details with:
   1. Microscopic observables only
   2. Macroscopic observables only
   3. Both microscopic and macroscopic observables
   4. None of these
3. In a fission reaction, which particle is used to bombard U-235?
   1. Alpha particle
   2. Proton
   3. Neutron
   4. Positron
4. When P.E of the spring is maximum for a spring mass system:
   1. K.E of mass is zero
   2. K.E of mass becomes infinite
   3. K.E of mass is maximum
   4. none of these
5. The radiation emitted due to sudden deceleration of electrons is called:
   1. Bremsstrahlung
   2. Larmor radiation
   3. Fluorescence
   4. Synchrotron
6. Which material should be inserted between the plates of a capacitor in order to increase its capacitance?
   1. mica
   2. copper
   3. ron
   4. tin
7. Lithosphere is composed mainly of:
   1. Gases
   2. Rocks and minerals
   3. Ice
   4. Water
8. Which one of the following is an amphoteric oxide?
   1. ZnO
   2. Na₂O
   3. SO₂
   4. B₂O₃
9. Intensity of light depends upon:
   1. Wavelength
   2. Amplitude
   3. Velocity
   4. Frequency
10. The balloon model shows that as the balloon expands:
    1. Dots remain at the same distance
    2. Dots move closer
    3. Dots move farther apart
    4. Dots disappear
11. Unit of capacitive reactance is:
    1. Ohm
    2. Farad
    3. Henry
    4. Tesla
12. Increasing the intensity of incident light of constant frequency above the threshold frequency results in:
    1. Increase in photoelectric current
    2. Increase in kinetic energy of electrons
    3. Both a and b
    4. No change
13. The first artificial satellite launched in 1957 was:
    1. Apollo 11
    2. Voyager 1
    3. Sputnik 1
    4. Explorer 1
14. The rms speed of gas molecules depends on:
    1. Temperature only
    2. Molar mass only
    3. Both temperature and molar mass
    4. Pressure only
15. If N is the number of undecayed nuclei, the activity is given by:
    1. A = λ/N
    2. A = N/λ
    3. A = λN
    4. A = N × T½
16. A mass attached to a spring completes 60 vibrations in half minute. Its frequency is:
    1. 120 Hertz
    2. 60 Hertz
    3. 30 Hertz
    4. 2 Hertz
17. Normal X-ray films are limited because:
    1. They are 3-D
    2. They only give shadow-like images
    3. They show color
    4. They cannot detect fractures