An aerospace engineer tests a miniature resistive heating element designed to prevent ice formation on a Martian lander's wind sensor.
The engineer records a steady current of 0.80 A0.80\text{ A}0.80 A flowing through the heating element when connected to an 18.0 V18.0\text{ V}18.0 V power supply.
Calculate the resistance of the heating element. Use the equation: potential difference=current×resistance\text{potential difference} = \text{current} \times \text{resistance}potential difference=current×resistance
Calculate the total charge that flows through the heating element when it operates continuously for 7.5 minutes7.5\text{ minutes}7.5 minutes.
Calculate the energy transferred to the heating element during this 7.5 minutes7.5\text{ minutes}7.5 minutes operating period. Use the equation: energy transferred=charge×potential difference\text{energy transferred} = \text{charge} \times \text{potential difference}energy transferred=charge×potential difference
42 exam-style questions on OCR GCSE Physics Simple circuits. Each one has a worked solution and a mark scheme showing where the marks go.