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9 exam-style questions with model answers, plus 11 quick multi-choice questions — every question on the site for this standard, grouped by the 3 pages of notes they come from.
Write a full answer before you reveal the model one — that comparison is where the marks come from. Every block links back to the notes that teach it.
In the context of an MRI scanner, state two key physics ideas that apply and relate each to a part of the scanner.
Explain how or why resonance allows an MRI scanner to select which part of the body is being imaged.
Discuss the physics of an MRI scanner, linking at least three ideas into a coherent picture of how the machine produces an image and why it needs the equipment it does.
In the context of medical ultrasound imaging, apply the concept of wave reflection to explain how an image is formed.
In the context of electric vehicle charging, apply the concept of power to explain why fast-chargers use much higher voltages than home chargers, including a calculation comparing the current needed for the same power at 240 V versus 400 V.
In the context of noise-cancelling headphones, integrate the concepts of superposition and wave phase to explain how they work, and discuss one limitation this physics implies.
In the context of earthquake-resistant buildings, relate the idea of natural frequency to a building's behaviour during a quake.
A building of mass kg is mounted on isolators of combined stiffness N m−1.
Calculate its natural period, and explain why increasing the period protects the building.
Discuss why base-isolated buildings require damping as well as flexible bearings, linking simple harmonic motion, resonance and energy to give a coherent account of the design.