2nd Year Physics 1st Quarter Book Paper

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

1. A motion which repeats itself after an equal interval of time is called a:

   1. Rotational motion

   2. Random motion

   3. Periodic motion

   4. Linear motion

2. An array of a large number of parallel slits with equal width and equal spacing between centers is called a:

   1. Plano-convex lens

   2. Rubens tube

   3. Diffraction grating

   4. Michelson interferometer

3. According to the kinetic theory, gas pressure arises due to particles interacting with each other and what else?

   1. The volume of the container

   2. The walls of the container

   3. The absolute zero temperature

   4. External atmospheric forces

4. The time period of a simple pendulum is directly proportional to the:

   1. Length of the string

   2. Square root of the length of the string

   3. Mass of the bob

   4. Amplitude of vibration

5. Who constructed the first diffraction grating using fine wires?

   1. Thomas Young

   2. James Clerk Maxwell

   3. Christiaan Huygens

   4. Joseph von Fraunhofer

6. In highly massive stars, successive fusion stages continue until the core forms increasingly complex nuclei up to which element?

   1. Helium

   2. Carbon

   3. Oxygen

   4. Iron

7. When a particle moves in a circular path, what component of its motion executes SHM?

   1. The actual circular path itself

   2. Its angular velocity vector

   3. Its projection on the diameter of the circle

   4. The tangential acceleration component

8. When white light shines on a thin film, different colors appear because different colors have different:

   1. Wavelengths

   2. Amplitudes

   3. Speeds in vacuum

   4. Intensities

9. As a molecular cloud contracts to form a proto-star, its density and temperature increase due to a rise in the:

   1. Kinetic energy of particles

   2. Chemical energy of dust

   3. Gravitational constant

   4. Total volume

10. In a Rubens tube, the low and high flames reveal the positions of:

    1. Pitch and loudness

    2. Crests and troughs

    3. Nodes and antinodes

    4. Speed and frequency

11. When we increase the number of slits in an interference experiment, the positions of the maxima remain the same, but they become:

    1. Progressively wider

    2. Progressively narrower

    3. Inverted

    4. Completely dim

12. Rapidly rotating neutron stars that emit regular beams of radiation are called:

    1. Black holes

    2. White dwarfs

    3. Pulsars

    4. Protostars