other point in the same Describe how the current varies if the ammeter is placed circuit.. in a series circuit. either side of a component? Explain why the current at each Link this idea about the in a series circuit must be current in a series circuit the same in terms of electrons being the same throughout not being lost from the wire. the circuit to the models of electricity looked at previously. 6.2.1.3 How the The current through a 1 Define resistance. What is resistance? resistance of a component depends on both Describe and explain how Why are materials with low component affects the resistance of the increasing the resistance in a resistance chosen for power the current component and the potential circuit will affect the current cables? through it. difference across the through the circuit. component. The greater the What are superconductors? resistance of the component Model the effect of resistance the smaller the current for a on a circuit. You can do this given potential difference with clear tubing and (p.d.) across the component. coloured water to act as the current. Pinch the tubing to show higher resistance. Investigate how increasing the resistance of a circuit affects the current. *. 6.2.1.3 How potential Current, potential difference 1 Use the equation to calculate How can the resistance of a difference, current or resistance can be the potential difference (voltage), component be calculated
other point in the same circuit.. Describe how the current varies in a series circuit. Explain why the current at each in a series circuit must be the same in terms of electrons not being lost from the wire. if the ammeter is placed either side of a component? Link this idea about the current in a series circuit being the same throughout the circuit to the models of electricity looked at previously. 6.2.1.3 How the resistance of a component affects the current through it. The current through a component depends on both the resistance of the component and the potential difference across the component. The greater the resistance of the component the smaller the current for a given potential difference (p.d.) across the component. 1 Define resistance. Describe and explain how increasing the resistance in a circuit will affect the current through the circuit. What is resistance? Why are materials with low resistance chosen for power cables? What are superconductors? Model the effect of resistance on a circuit. You can do this with clear tubing and coloured water to act as the current. Pinch the tubing to show higher resistance. Investigate how increasing the resistance of a circuit affects the current. *. 6.2.1.3 How potential difference, current Current, potential difference or resistance can be 1 Use the equation to calculate the potential difference (voltage), How can the resistance of a component be calculated
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