Topic 5 - Electric Currents

From KstructIB

[edit] 5.1 Electric potential difference, current and resistance

Electric potential difference

5.1.1 Define electric potential difference.

5.1.2 Determine the change in potential energy when a charge moves between two points at different potentials.

5.1.3 Define the electronvolt.

5.1.4 Solve problems involving electric potential difference.

Electric current and resistance

5.1.5 Define electric current.

5.1.6 Define resistance.

5.1.7 Apply the equation for resistance in the form where ρ is the resistivity of the material of the resistor.

5.1.8 State Ohm’s law.

5.1.9 Compare ohmic and non-ohmic behaviour.

5.1.10 Derive and apply expressions for electrical power dissipation in resistors.

5.1.11 Solve problems involving potential difference, current and resistance.

[edit] 5.2 Electric circuits

5.2.1 Define electromotive force (emf).

5.2.2 Describe the concept of internal resistance.

5.2.3 Apply the equations for resistors in series and in parallel.

5.2.4 Draw circuit diagrams.

5.2.5 Describe the use of ideal ammeters and ideal voltmeters.

5.2.6 Describe a potential divider.

5.2.7 Explain the use of sensors in potential divider circuits.