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Combined Science — Physics Flashcards

6 cards from real O-LEVEL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Combined Science — Physics flashcards as text

  1. What does the 'law of reflection' state?

    Answer: Angle of incidence equals angle of reflection

    The law of reflection states that the angle of incidence equals the angle of reflection, both measured from the normal.

  2. A force of 20 N acts on an area of 4 m². What is the pressure?

    Answer: 5 Pa

    Pressure = Force/Area = 20/4 = 5 Pa.

  3. What type of charge do electrons carry?

    Answer: Negative

    Electrons carry a negative charge, while protons carry a positive charge and neutrons are neutral.

  4. Which component stores electrical energy in a circuit?

    Answer: Capacitor

    A capacitor stores electrical energy in an electric field between two conducting plates separated by an insulator.

  5. What is the difference between speed and velocity?

    Answer: Velocity has direction; speed does not

    Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

  6. Which part of the electromagnetic spectrum is used in medical X-ray imaging?

    Answer: X-rays

    X-rays are used in medical imaging because they can penetrate soft tissue but are absorbed by denser materials like bone, creating an image.

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