[S4 Physics PMCians]
What we did in 2 hours:
In the last lesson of Current of Electricity, we finally understand how temperature can affect the resistance of a conductor (or semi-conductor). And from that understanding, we’ll be able to predict the shape of its I-V graph.
We also learnt about the semi-conductor diode and how to apply it to a circuit, whether its DC or AC. And we had a sneak preview of DC circuits as well, showing you guys a cool method (shortcut) to solving potential difference in a series circuit.
Lastly, many of you did well or even obtain full marks for COE test B, keep it up! You fully deserve a pat on the back and of course, a treat from us in the form of PMC dollars!
What you take home:
Interesting experiment to show how the resistance of a conductor changes as it is placed in liquid nitrogen. Observe how the light bulb changes its brightness over time, do you know why?