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Federal (FBISE) · Quarter book test · Free

10th Class Physics 2nd Quarter Book Paper

40 marks · 1 hour · 28 questions. Covers: 13. Sound, 14. Optics, 15. Electrostatics.

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10th Class Physics 2nd Quarter Book Paper

10th Class · Physics · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 40Time: 1 hour

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

  1. The center point through which the principal axis passes in a lens is called:
    1. Focal point
    2. Optical center
    3. Curvature center
    4. Normal
  2. Infrasonic waves have frequency.
    1. greater than 20 Hz
    2. less than 20 Hz
    3. of 20 Hz
    4. of 20 kHz
  3. The process used in photocopiers is called:
    1. Polarization
    2. Xerography
    3. Magnetography
    4. Ionization
  4. The distance from the lens to its focal point is called:
    1. Principal axis
    2. Optical center
    3. Focal length
    4. Curvature
  5. Sound waves are:
    1. Transverse in nature
    2. Longitudinal in nature
    3. Electromagnetic
    4. None of these
  6. Placing an insulator in humid conditions helps in discharging because:
    1. Humid air absorbs heat
    2. Water molecules act as conductors
    3. Humid air neutralizes protons
    4. None
  7. The apparent flattening of the Sun at the dawn and dusk is due to phenomenon of:
    1. Refraction
    2. Reflection
    3. Dispersion
    4. Polarization
  8. SONAR stands for:
    1. Sound Navigation and Ranging
    2. Sound Notation and Recording
    3. Sound Node and Receiver
    4. Signal Navigation and Radar
  9. What causes the leaves of an electroscope to move apart when charged?
    1. Attraction of unlike charges
    2. Repulsion of like charges
    3. Neutral nature of leaves
    4. Air pressure
  10. The two types of photoreceptor cells in the retina are:
    1. Cones and optic nerve
    2. Pupil and iris
    3. Rods and cones
    4. Retina and cornea
  11. Noise from construction sites is produced by:
    1. Birds
    2. Excavation and road work
    3. Music
    4. Trees
  12. Free electrons in conductors are also called:
    1. Valence electrons
    2. Nucleons
    3. Mobile electrons
    4. Static electrons

Q2. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. Why are metals good conductors?
  2. Which nerve carries electrical signals to the brain?
  3. If we dip a lens in water, what happens to its focal length? Elaborate.
  4. What happens when charge is placed on an insulator?
  5. Which animals use infrasound for communication?
  6. What is linear magnification?
  7. A positive test charge of 30 μC is placed in an electric field. The force on it is 0.600 N. What is the magnitude of the electric field at the location of the test charge?
  8. How does temperature affect refraction of sound waves?
  9. Why are school halls often built with curved ceilings?
  10. Explain the process of lightning generation.
  11. What is meant by the source of sound?
  12. How does powder take the shine off a person's nose?

Q3. Long questions (Attempt any 3 of 4 · 3 × 4 = 12)

  1. A small charge of 3.0 μC is placed in a uniform electric field of 1.5 N/C. Calculate force on the charge.
  2. Humans can hear frequencies from approximately 20 Hz to 20,000 Hz. Analyze how sounds outside this range (infrasound and ultrasound) are utilized in nature and technology. What are the implications of these frequencies for human hearing?
  3. Design some single-lens optical devices.
  4. What is a lightning rod? Explain its structure, working, and importance.