Your students extend their understanding of Ohm’s Law by doing calculations with voltage, current, and resistance data.
1. A smartphone with a resistance of 35 ohms has a current of 0.25 amps flowing through it. Sketch a circuit diagram and calculate how many volts supply the smart phone.
2. A 120-volt power source supplies a computer with a resistance of 210 ohms. What is the current flow of the circuit?
3. Calculate the resistance of the following circuit diagram:
4. What amount of voltage would you need to run a current of 1.2 amps through a 250-ohm resistor?
5. Using the given variables, calculate the unknown value:
Ohm’s Law represents the relationship between voltage and current. It is usually represented mathematically:
It’s necessary to convert milliamperes (mA) to amperes (A) when using Ohm’s Law. There are 1,000 milliamperes (mA) in one ampere (A).