Edexcel IGCSE Physics 2.10 Resistance and Current Questions

For the same supply voltage, greater total resistance means less current. Apply this relationship to series resistors, an LDR or a long cable.

Exam points

explain why adding resistors in series increases total resistance and reduces current
predict the current change when an LDR or resistor has a lower resistance

[Maximum number: 1]

The circuit diagram shows a light dependent resistor (LDR) and a $73 \Omega$ resistor connected in series with a 1.5 V cell.

The graph shows how the resistance of the LDR changes with light intensity.

The resistance of the LDR decreases.

State the effect on the current in the circuit.

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