Ohm's law

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/ohms-law

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the discoverer?Georg Simon Ohm, German physicist
2. What is the empirical basis?Derived from experimental measurements of voltage and current relationships
3. How does Ohm's Law help with LED circuits?When building an LED circuit, Ohm's Law lets you pick the right resistor so the LED gets just the right amount of current and stays safe.
4. Why does the current change when we change the voltage?Because current is directly proportional to voltage—double the voltage and the current doubles, if resistance stays the same.

Voltage (V): Electrical potential difference, the driving force for current, measured in volts.
Current (I): The flow rate of electric charge, measured in amperes (A).
Resistance (R): Opposition to current flow, a property of materials, measured in ohms (Ω).
Conductivity (σ): A measure of how easily a material conducts electric current, the inverse of resistivity.