2nd Year Physics First half Book Paper

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

1. Which medical application of capacitors delivers a life-saving shock to restore a normal heart rhythm?

   1. Defibrillator

   2. Ultrasound machine

   3. X-Ray filtration

   4. EEG signal recorder

2. Through which of the AC-circuit elements both emf and current are in phase?

   1. Resistance

   2. Inductor

   3. Capacitor

   4. LED

3. 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

4. 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

5. 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

6. The capacitance C of a parallel plate capacitor depends upon:

   1. The magnitude of the charge only

   2. The applied voltage only

   3. The mass of the metal plates

   4. The geometry of the plates and the medium between them

7. An alternating current (AC) varies sinusoidally and can be represented by time-dependent:

   1. Linear functions

   2. Sine or cosine functions

   3. Logarithmic functions

   4. Exponential functions

8. 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

9. 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

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

    1. Thomas Young

    2. James Clerk Maxwell

    3. Christiaan Huygens

    4. Joseph von Fraunhofer

11. In a parallel plate capacitor, the electric field E between the plates is assumed to be uniform because:

    1. The plates are made of copper

    2. The voltage is alternating

    3. The distance d between the plates is small

    4. A vacuum is present between them

12. Power dissipation in a purely resistive AC circuit is directly proportional to the:

    1. Square of the current

    2. Square root of the current

    3. Inverse of the current

    4. Square of the resistance

13. 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

14. 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

15. 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

16. When a slab of dielectric is placed between two oppositely charged plates, its atoms get:

    1. Ionized

    2. Polarized

    3. Demagnetized

    4. Conductive

17. Name of device that is used as a part of charging circuit for mobile phones is:

    1. Full-wave bridge rectifier

    2. Half-wave rectifier

    3. AC generator

    4. Battery