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Punjab (PTB) · Half book test (board pattern) · Free

10th Class Physics First half Book Paper

60 marks · About 2 hours (objective and subjective) · 39 questions. Covers: 6 chapters (CHAP 10: THERMAL PHYSICS to CHAP 15: ELECTROSTATICS).

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10th Class Physics First half Book Paper

10th Class · Physics · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 60Time: About 2 hours (objective and subjective)

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

  1. Which of the following is required for sound to travel?

    1. A vacuum

    2. A medium

    3. Darkness

    4. Magnetic field

  2. Running warm water over a tight metal lid of a jar helps to open it because:

    1. The glass jar expands

    2. The metal lid expands slightly

    3. The liquid inside freezes

    4. The lid contracts

  3. What is the fundamental rule of electrostatics regarding charges?

    1. Like charges attract, opposite charges repel

    2. Like charges repel, opposite charges attract

    3. All charges always attract each other

    4. Charges have no effect on each other

  4. Thermal radiation travels in the form of:

    1. Sound waves

    2. Water waves

    3. Electromagnetic waves

    4. Vibrating atoms

  5. The maximum displacement of a point on a wave from its rest position is the:

    1. Wavelength

    2. Frequency

    3. Amplitude

    4. Time period

  6. Which of the following material has the highest refractive index?

    1. Water

    2. Glass

    3. Diamond

    4. Ice

  7. When we speak, which part of our body vibrates to produce sound waves?

    1. Eardrums

    2. Vocal cords

    3. Lungs

    4. Tongue

  8. When the temperature of a rod of copper is increased, its length:

    1. Remains the same

    2. Increases

    3. Decreases

    4. Becomes double

  9. Electrical breakdown is:

    1. The process of ionizing a gas due to a strong electric field

    2. The process of neutralizing a charged object

    3. The process of charging an insulator

    4. The process of discharging a conductor

  10. The natural phenomenon caused by convection current is:

    1. Earthquakes

    2. Land and sea breezes

    3. Magnetic fields

    4. Solar eclipses

  11. Which are the fastest seismic waves and the first to be detected during an earthquake?

    1. Secondary waves

    2. Surface waves

    3. Primary waves

    4. Tidal waves

  12. When an incident ray strikes the prism at point E, it bends:

    1. Away from the normal

    2. Towards the normal

    3. Backwards

    4. It does not bend

Q2. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. Why is wood used in applications requiring thermal insulation?

  2. Why do radiators have fins?

  3. Why do substances expand when heated?

  4. In which state of matter is conduction most efficient?

  5. How does surface area affect ecaporation?

  6. What is global warming?

  7. How do different materials exhibit varying thermal expansion behaviours?

  8. What is double-glazing?

Q3. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. What is meant by the longitudinal nature of sound waves?

  2. What happens when a twig is dropped into still water?

  3. Does sound wave show reflection?

  4. What is the speed of electromagnetic waves in a vacuum?

  5. Why do voices of men sound deeper than those of women or children, even when they are speaking at the same intensity? Explain using the relationship between frequency and pitch.

  6. How does the amplitude of a wave relate to the energy it carries? Give an example to support your answer.

  7. What happens to the sound of the bell inside a bell jar when air is pumped out? What does it prove?

  8. What are compressions and rarefaction?

Q4. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. How does a lightning rod safeguard a building and its occupants?

  2. Why does light change direction when it passes from one medium to another?

  3. What happens when like charges and unlike charges are brought close to each other?

  4. What is hypermetropia.

  5. What is meant by a uniform electric field, and where is it commonly observed?

  6. Define short sightedness (myopia).

  7. Briefly explain the phenomenon of "Corona Discharge" mentioned in the text.

  8. Define refractive index. What is the refractive index of air and water?

Q5. Long questions (Attempt any 2 of 3 · 2 × 9 = 18)

  1. Discuss the role of greenhouse effect in regulating Earth's temperature. What are the potential consequences of an enhanced greenhouse effect due to human activities?

  2. A steel bridge expands by 5 cm on a hot summer day. If the bridge originally spanned 100 m, what is the temperature change?

  3. Describe how sound propagates through a medium as a wave?