Resistance and circuit components

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Question 54
Easy

Component Y is connected to a 9 V d.c. power supply.

The graph below shows how the resistance of Component Y varies with temperature.

Graph of Resistance against Temperature for Component Y

Which of these expressions gives the current, III (in amperes), in component Y when the temperature is 60 ∘C60\ ^\circ\text{C}60 ∘C?

I=9×3000I = 9 \times 3000I=9×3000

I=93000I = \frac{9}{3000}I=30009​

I=923000I = \frac{9^2}{3000}I=300092​

I=93000I = \sqrt{\frac{9}{3000}}I=30009​​

Resistance and circuit components Questions

  1. GCSE
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