In this post, let’s look at what’s tested in detail for electromagnetic induction for O Level physics.
I go through the points in detail in my video here.
This chapter has some definitions. You can find a list of definitions for O Level Physics here. There are also some calculation questions from this chapter. For calculation questions, it’ll involve the use of formulae. You can find a compilation of the formulae for O Level Physics here.
Below is a checklist of what you need to know for O Level Physics on the topic of electromagnetic induction.
Checklist for Electromagnetic Induction for O Level Physics
✓ apply Faraday’s experiment on electromagnetic induction to explain the following:
- why an emf is induced (or not)
- direction of induced e.m.f
- factors affecting magnitude of induced e.m.f
✓ describe how an a.c. generator works, purpose of slip ring and sketch a graph of voltage output vs time
✓ describe use of a cathode-ray oscillator (CRO) to display waveforms, and interpret of sketch waveforms on CRO
✓ describe how a transformer works, and conduct calculations involving the formula for ideal transformer:
Ns/Np = Vs/Vp = Ip/Is
✓ Describe energy loss in cables and explain why energy transmission often involve high voltage.
Watch the video below to learn D.C circuit in detail.