Started with some ground rules, things that students need to bring along for Physics lessons:-
1) 30-cm long plastic ruler
2) MOE-approved scientific calculators (Bring a spare one if you can)
3) Blue or black inked pens
4) Pencils
5) Eraser
6) Files (Physics & SPA)
Topic covered today...
1) Revision on Current Electricity
Electromotive Force or emf is the amount of energy required to drive a unit charge throughout a circuit.
Potential Difference (p.d.) is the amount of energy required to drive a unit charge across an electrical component/load (such as resistor, bulb, etc.)
Current (I) is the amount of charges that flows in one second.
We also covered Ohm's law. The function derived from Ohm's law: V=IR
where
V= p.d. in volts
I= current in ampere
R= resistance in ohms
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