Extend your knowledge of the relationship between voltage, current, and resistance.
Your students extend their understanding of Ohm’s Law by doing calculations with voltage, current, and resistance data.
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).
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:
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