A student builds a circuit to investigate how the current through component X changes with potential difference.
What is the name of the component represented by the rectangular symbol with a diagonal arrow pointing through it?
Why is this component needed in this circuit?
The student uses the circuit to take current and potential difference readings. The student plots a graph of her results.
Look at the graph. What is component X in the circuit?
Describe how the graph shows that the resistance of component X varies as the potential difference increases, and explain why this behavior occurs in this component.
Component X has a resistance of 80 Ω80\ \Omega80 Ω when a current of 0.15 A0.15\text{ A}0.15 A flows through it.
Calculate the potential difference across component X. Use the equation: Potential difference=Current×Resistance\text{Potential difference} = \text{Current} \times \text{Resistance}Potential difference=Current×Resistance
Calculate the power dissipated by component X when a current of 0.15 A0.15\text{ A}0.15 A flows.