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Class 10 Physics · Chapter 11 · Test 2

Test 2: Radiations, Radioactive Decay, Nuclear Reactions, Half-Life and Uses

MCQs

30 questions · 25 min · 30 marks

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Sample questions

The first 5 of 30. Try each one, then tap to see the answer.

  1. Question 1

    Nuclear fission involves:

    • Acombining light nuclei to form heavier ones
    • Bsplitting heavy atomic nuclei into smaller ones
    • Cabsorbing gamma radiation to increase stability
    • Dnone of the above
    Show answer

    Answer: B

    In fission a heavy nucleus splits into two smaller nuclei (Exercise A 20.5).

  2. Question 2

    What does Einstein's equation E = mc² explain?

    • AThe energy released in chemical reactions
    • BThe equivalence of mass and energy
    • CThe rate of radioactive decay
    • DThe conversion of mass into momentum
    Show answer

    Answer: B

    Matter and energy can be converted into each other (Exercise A 20.6).

  3. Question 3

    Which of the following is a practical application of nuclear radiations?

    • ACooking food in microwave ovens
    • BMedical imaging and cancer treatments
    • CSolar energy generation
    • DAirplane navigation systems
    Show answer

    Answer: B

    Nuclear radiation is used in medicine, e.g. radiotherapy and imaging (Exercise A 20.7).

  4. Question 4

    What are the potential effects of ionizing nuclear radiation on biological tissues?

    • AIncreased cellular regeneration
    • BDNA damage and cancer
    • CEnhanced immune system response
    • DImproved metabolic activity
    Show answer

    Answer: B

    Radiation can damage DNA and cause mutations and cancer (Exercise A 20.8).

  5. Question 5

    The charge on an alpha particle is:

    • A+2e
    • B-2e
    • C+1e
    • D0
    Show answer

    Answer: A

    Alpha particles carry a +2e charge.

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