2nd Year Physics 1st Quarter Book Paper

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

1. Artificial satellites are used for:
   1. Communication
   2. Military operations
   3. Scientific research
   4. All of the above
2. 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
3. Statistical mechanics connects microscopic details with:
   1. Microscopic observables only
   2. Macroscopic observables only
   3. Both microscopic and macroscopic observables
   4. None of these
4. The first artificial satellite launched in 1957 was:
   1. Apollo 11
   2. Voyager 1
   3. Sputnik 1
   4. Explorer 1
5. 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
6. The rms speed of gas molecules depends on:
   1. Temperature only
   2. Molar mass only
   3. Both temperature and molar mass
   4. Pressure only
7. If medium between the masses is changed by a conductor then the gravitational force will
   1. increase
   2. decrease
   3. remain constant
   4. become zero
8. If mass attached to a spring is made four times, the time period becomes:
   1. Doubled
   2. One half
   3. Remains same
   4. Four times
9. Average velocity of molecules in a gas:
   1. zero
   2. positive
   3. negative
   4. infinity
10. Gravitational potential at a point is defined as:
    1. Work done per unit distance
    2. Work done per unit mass
    3. Work done per unit force
    4. Work done per unit velocity
11. Food being cooked in microwave oven is an example of:
    1. Unequal the natural frequency
    2. Overtone
    3. Resonance
    4. Stationary waves
12. The equation of state of n moles of an ideal gas is PV = nRT, where R is a constant. The SI unit for R is:
    1. Jkg⁻¹K⁻¹
    2. Jg⁻¹k⁻¹
    3. JK⁻¹ mol⁻¹
    4. JK⁻¹ per molecule