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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. Which of the following is a good conductor of electricity?

    Answer: Copper

    Copper is an excellent conductor of electricity due to its free electrons that can move easily.

  2. What happens to the resistance of a wire if its length is doubled?

    Answer: Doubled

    Resistance is directly proportional to length (R = ρL/A). Doubling the length doubles the resistance.

  3. A wave has frequency 50 Hz and wavelength 4 m. What is its speed?

    Answer: 200 m/s

    Wave speed = frequency × wavelength = 50 × 4 = 200 m/s.

  4. What is the principle of conservation of energy?

    Answer: Energy cannot be created or destroyed, only converted

    The principle of conservation of energy states that energy cannot be created or destroyed, only converted from one form to another.

  5. Which colour of visible light has the highest frequency?

    Answer: Violet

    In the visible spectrum, violet light has the highest frequency (and shortest wavelength), while red has the lowest frequency.

  6. What does an ammeter measure?

    Answer: Current

    An ammeter measures electric current in amperes (A) and is connected in series in a circuit.

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