Bipolar junction transistor

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/bipolar-junction-transistor

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 charge carriers?Utilizes both electrons and holes for electrical conduction
2. What is the primary functions?Signal amplification and high-speed electronic switching
3. What is a bipolar junction transistor (BJT)?A BJT is a small device made from semiconductor material that uses both electrons and holes to control electricity. It has three layers that form two p‑n junctions, and it can be arranged as NPN or PNP.
4. How does a BJT control electricity in a circuit?A tiny current sent to the base of a BJT turns on a much larger current that flows from the collector to the emitter. This lets the BJT amplify weak signals or act as a fast switch.

Bipolar Junction Transistor (BJT): A three-terminal semiconductor device that controls current flow using both electrons and holes.