How To Make An Investigatory Project In Physics?

Whats a good physics investigatory project?

• Answer:

  One thing you could do would be to see how good Ohm's law is for describing real appliances like a light bulb. This project would be quite clever, have real-world applications, and be quite a valid line of inquiry, but wouldn't require knowledge or equipment that a typical high school student couldn't get. You'll need: * A light bulb * A voltmeter/ammeter (most high schools have these) * A set of batteries with different voltages (a lot of high schools have variable power supplies, which would be even better for this job). What you could do would be to set up the circuit with a known voltage. Then measure the current and voltage across the light bulb with the multimeter. Then change the voltage, and measure the voltage and current across the light bulb again. If the light bulb obey's Ohm's law, then the resistance calculated by R = V/I should be the same (R is resistance, V is voltage, and I is current). They usually teach Ohm's law in high school, but they often don't mention that it isn't actually true for a lot of real devices.