Physics Β· Unit 1 Β· Electrical circuits Β· Current, potential difference and energy flow
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A technician is testing three different heating elements labelled A, B and C for a domestic appliance. Each element is designed to operate at 240 V mains supply. The technician measures the current drawn by each element and records the results in the table below. Refer to the table. (a) Identify which heating element has the greatest resistance. (b) Compare the power consumption of elements A and C.
A resistor in a circuit has a resistance of 47 Ξ© and carries a current of 0.25 A. State the potential difference across the resistor and identify the appropriate SI unit.
A resistor rated at $360\,\Omega$ is connected to a 12 V power supply. Which of the following correctly identifies the current flowing through the resistor?
A student investigates the relationship between potential difference and current in two resistive components, labelled X and Y. The table below shows the data collected. Identify which component has the greater resistance and compare the current drawn by each component when a 9.0 V battery is applied.