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Figure 5 shows the variation of resistance R+ with temperature for a thermistor .Figure 6 shows the variation of resistance R₁ with light level for an LDR. Figure 6 is plotted on logarithmic-linear axes.

The circuit is placed in shadow where the light level is X as shown in Figure 6.The temperature of the thermistor is 15 °C. Determine the current in the circuit. 2The circuit is now placed in full sunlight where the light level is Y as shownin Figure 6. The temperature changes so that the resistance of the thermistor is 5.5 kn. Determine the potential difference across the thermistor.

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