WAEC Physics 2014 Objective — Question 46
Question 46 of 50 from the West African Examinations Council (WAEC) Physics 2014 Objective paper, with the correct answer and a full explanation.
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The circuit illustrates a standard resistor R, voltage source E, and a lamp L connected in series. If the temperature of R is increased, the brightness of lamp L will
- A. increase sharply
- B. decrease slightlyCorrect
- C. remain the same
- D. increase gradually
Explanation
As the temperature of R increases, its resistance increases, reducing the current in the series circuit, so the brightness of the lamp decreases slightly.
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