# As level to A level ```AS level topics / refresher IGCSE that you are expected to know for A level.
1) Uncertainty
Calculating Absolute uncertainty and percentage uncertainty for measurements.
Determining uncertainty of analog and digital equipment.
Plotting Error bard in one axis (y or x axis).
Determine the uncertainty in gradient and Y intercept. – Graph uncertainty
2) Resolving Vectors
Resolving vectors into its horizontal component and vertical components including when the
forces are at an angle.
3) Simple Harmonic motion
Calculating time period of mass spring and simple pendulum.
Energy variations of a simple pendulum and mass-spring system.
4) Graph – Gradient, Best fit line
Determining gradient from velocity-time graph, acceleration-time graph and force -extension
graph.
5) Magnets and Electromagnets
Explain what happens when current carrying conductor placed in a magnetic field.
Explain electromagnetic induction and describe the ways of increasing the strength of induced
emf.
Left hand rule, motor effect, generator effect, magnetic flux density.
Determine half life from the activity-time graph or count-rate time graph.
Determine decay constant and half life from A = A0e–λt.
AS level Topic to concentrate for a C-D and above which refer to all topics in Specification.
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Young’s Modulus
Projectile Motion
Moment, Momentum
Motion Graphs
Potential divider
Internal resistance and Emf
Interference (Double slit)
Diffraction (Single slit, Diffraction grating)
Photo electricity
X-ray (Line and Continuous Spectrum)
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