Physical quantities & measurement
Lengths, volumes, time intervals, repeated measurements, pendulum period and vector addition.
Physics Virtual Lab Library
Interactive Cambridge IGCSE Physics experiments — open a lab and learn by measuring, changing variables and observing the results.
10interactive labs
About Ahmed Salama
I am an IGCSE Physics teacher with more than 12 years of teaching experience across Egypt, Oman and Saudi Arabia. For the past nine years, I have specialised in international physics curricula, including Cambridge IGCSE and AP Physics. I currently teach IGCSE Physics at Al-Rowad International School in Riyadh, having previously taught at Alhussan International School.
My teaching approach begins with genuine understanding, then helps students apply that understanding to exam questions accurately and confidently — so they can achieve the grades they are aiming for.
I am currently working towards Qualified Teacher Status (QTS) in the UK and have been recognised as a Highly Effective Teacher, with a rating above 95%, for three consecutive years at Al-Rowad International School.
Topic 1Motion, forces and energy
Chapter 1 · Making measurements
Chapter 2 · Motion
Chapter 3 · Mass, weight & density
Chapter 4 · Forces & Newton’s laws
Topic 4Electricity and magnetism
Chapter 16 · Magnetism
Chapter 17 · Static electricity
Chapter 18 · Electrical quantities
Electric current, e.m.f. & potential difference
Investigate charge flow, meter ranges, direct and alternating current, and energy transferred per unit charge.
Resistance, Ohm’s law, power & energy
Investigate resistance, plot I–V characteristics, calculate electrical power and energy, and explore kWh cost.
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