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Physics — Tier 3

Mechanics, electromagnetism, optics, and modern physics for Classes XI–XII

Sample Practice Questions

  1. Two charged spheres attract when charges are:

    • Same sign
    • Opposite signs
    • Zero
    • Same magnitude only
    Show answer

    Answer: Opposite signs

  2. The work-energy theorem states:

    • Work = Force × time
    • Net work done = Change in kinetic energy
    • Work = mgh
    • Work = Power/time
    Show answer

    Answer: Net work done = Change in kinetic energy

  3. Radioactive decay law: N = N₀e^(−λt). λ is the:

    • Half-life
    • Mean life
    • Decay constant
    • Initial activity
    Show answer

    Answer: Decay constant

  4. The principle behind MRI (Magnetic Resonance Imaging) is:

    • X-ray absorption
    • Ultrasound reflection
    • Nuclear magnetic resonance of hydrogen protons
    • Radioactive decay
    Show answer

    Answer: Nuclear magnetic resonance of hydrogen protons

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Practice Questions

Practise NGSE questions on Physics — Tier 3. Answers are revealed after each question.

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