ESAT Physics
PHYSICS WORKED EXAMPLES.
3 worked ESAT Physics questions, each with a route line before the working, numbered steps, and the specific mistake every wrong option was built to catch. Written from scratch to the published content specification.
- How fast is a block moving at the bottom of a smooth slope? On a smooth slope the speed at the bottom depends only on the vertical height dropped, not on the length of the slope or its angle. Use v = √(2gh) with h the vertical drop, which for a 10 m slope at 30° is 5 m, giving 10 m/s. P2.1 · MECHANICS AND ENERGY
- How do you find the primary current in an ideal transformer? Work out the secondary side completely first, then cross to the primary using conservation of power, because an ideal transformer transfers all of it. Voltage scales with the turns ratio and current scales with its inverse, so a transformer that steps voltage down steps current up. P3.2 · ELECTRICITY
- What does a voltmeter read across a potential divider? A voltmeter of finite resistance sits in parallel with the resistor it measures and lowers the resistance of that branch, so it always reads less than the unloaded divider would suggest. The effect is negligible only when the meter resistance is much larger than the resistor it is across, which is exactly what this question removes. P3.2 · ELECTRICITY
SIT A WHOLE PAPER, NOT A QUESTION.
A complete ESAT Mathematics 1 mock paper with every worked solution, free.