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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 is Ohm's Law?

    Answer: V = IR

    Ohm's Law states V = IR, where V is voltage (volts), I is current (amperes), and R is resistance (ohms).

  2. Which state of matter has a definite shape and volume?

    Answer: Solid

    Solids have a definite shape and volume because particles are closely packed in fixed positions with strong intermolecular forces.

  3. What energy transformation occurs in a solar cell?

    Answer: Light to electrical

    Solar cells (photovoltaic cells) convert light energy (from the sun) into electrical energy.

  4. An object is placed at the focal point of a converging lens. Where does the image form?

    Answer: At infinity

    When an object is placed at the focal point of a converging lens, the refracted rays are parallel and the image forms at infinity.

  5. What is the formula for calculating power?

    Answer: P = E/t

    Power = Energy/time (P = E/t), measured in watts (W). Also P = IV for electrical power.

  6. Which of the following is NOT a renewable energy source?

    Answer: Coal

    Coal is a fossil fuel — a non-renewable energy source that takes millions of years to form and cannot be replenished on a human timescale.

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