| Cenco Physics

| Cenco Physics

Electric Currents

Topic #	Old Topic	Old # Hrs	New Topic #	New Topic	New # Hrs
			5	Electric currents	7
			5.1	Electric potential difference, current and resistance	4
			5.1.7	Apply the equation for resistance in the form R=ρL/A where ρ is the resistivity of the material of the resistor.
			5.1.11	Solve problems involving potential difference, current and resistance.
			5.2	Electric circuits	3
			5.2.6	Describe a potential divider
			5.2.7	Explain the use of sensors in potential divider circuits. Sensors shoud include light-dependent resistors (LDRs), negative temperature coefficients (NTC) thermistors and strain gauges.
			5.2.8	Solve problems involving electric circuits. Students should appreciate that many circuit problems may be solved by regarding the circuit as a potential divider. Students should be aware that ammeters and voltmeters have their own resistance.