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Punjab (PTB) · Quarter book test · Free

10th Class Physics 4th Quarter Book Paper

40 marks · 1 hour · 28 questions. Covers: CHAP 19: ELECTRONICS, CHAP 20: ATOMIC AND NUCLEAR PHYSICS, CHAP 21: SPACE AND ENVIRONMENT.

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10th Class Physics 4th Quarter Book Paper

10th Class · Physics · Punjab (PTB)

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

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

  1. What fuels hurricanes and makes them stronger and more destructive?

    1. Freezing temperatures

    2. Heat absorbed by the ocean

    3. Tectonic plate movements

    4. Geysers and hot springs

  2. The process of adding impurities to a pure semi condutor is called:

    1. Annealing

    2. Doping

    3. Heating

    4. Diffusion

  3. Half life of Uranium is:

    1. 4.5 billion years

    2. 4.6 billion years

    3. 4.7 billion years

    4. 4.8 billion years

  4. Sun contains helium:

    1. 20%

    2. 24%

    3. 30%

    4. 74%

  5. What does the small bubble circle at the output of a NAND or NOR gate symbol represent?

    1. Amplification

    2. Inversion

    3. High voltage

    4. Ground connection

  6. Theoretically, a single gram of matter can be converted into enough energy to power a ...... for days.

    1. Small lamp

    2. Complete city

    3. Single house

    4. Calculator

  7. A major cause of rising sea levels is:

    1. Increased volcanic activity

    2. The Earth moving closer to the Sun

    3. Melting glaciers and ice sheets

    4. Decreased solar radiation

  8. In the burglar alarm circuit, when light falls on the LDR, its resistance is ...... .

    1. High

    2. Low

    3. Infinite

    4. Negative

  9. Which type of radiation is positively charged and consists of two protons and two neutrons?

    1. Alpha

    2. Beta

    3. Gamma

    4. Neutron emission

  10. The melting of ice and expansion of seawater due to global warming directly results in ...... .

    1. Volcanic eruptions

    2. Movement of tectonic plates

    3. Higher sea levels

    4. More oxygen in the air

  11. A binary variable has how many possible states?

    1. One

    2. Two

    3. Four

    4. Infinite

  12. Carbon dating is a scientific method used to determine the age of ancient organic materials up to how many years old?

    1. 5,730 years

    2. 50,000 years

    3. 4.5 billion years

    4. 10,000 years

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

  1. Define isotopes.

  2. Solve the left "Brain Teaser": Show how a NOR gate followed by a NOT gate acts as an OR gate.

  3. What is global warming? write few causes of it?

  4. What is Dalton theory of atomic model?

  5.  Draw or describe the symbolic representation of a semiconductor diode.

  6. What is the role of energy coming from sun?

  7. Differentiate between Charge Number and Mass Number.

  8. Define Boolean Algebra and state its significance in computing.

  9. Why do cyclones weaken when they move over land?

  10. If an atom is mostly empty space, why do not we fall through solid objects or pass through walls?

  11. What is the role of an AND gate in digital circuits?

  12. What are the safety measures during radiation exposure?

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

  1. What are the major sources of background radiation, and how does human activities contribute to it?

  2. Define radioactive decay? Explain how radioactive decay help an unstable atom to change in stable one?

  3. Explain how the depletion region of a diode changes in forward and reverse bias. What effect does this have on current flow?

  4. Esxplain the role of convection in the formation and strengthening of cyclones.