WAEC Physics 2021 Objective — Question 37

Question 37 of 50 from the West African Examinations Council (WAEC) Physics 2021 Objective paper, with the correct answer and a full explanation.

37. An electric circuit consists of a resistor, a battery and a key. If the voltage of the battery is increased, there would be an increase in the

A. current and resistance
B. resistance and temperature
C. current and temperature onlyCorrect
D. resistance and temperature only

Explanation

Increasing the voltage increases the current flowing (V=IR), and the greater current raises the temperature of the resistor due to increased heating effect.

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