Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
What is the major difference between static electricity and current electricity? |
Current electricity involves a flow of electrons; static electricity involves a single transfer ofelectrons |
|
What is static electricity caused by? |
An imbalance of positive and negative charges |
|
If a substance has an excess number of electrons on its surface, what type of chargedoes it have? |
A negative charge |
|
Which of the following atoms is considered neutral? |
An atom with five protons, six neutrons, and five electrons |
|
How are electrons different from protons and neutrons? |
Protons and neutrons exist inside atomic nuclei; electrons orbit atomic nuclei |
|
What can you infer about any object that gives you a static shock when you touch it? |
It's a conductor |
|
What happens when you touch a metal doorknob after rubbing your shoes on thecarpet? |
Millions of electrons go from your finger into the doorknob |
|
Lightning is a form of static electricity. What can you infer about what happens whenlightning strikes the ground? |
An electric current is established between the clouds and the ground |
|
How does alternating current differ from direct current? |
Direct current always flows in the same direction; the direction of an alternating currentswitches back and forth |
|
How does electricity travel from power plants to your house? |
Through transmission wires |
|
What is the function of every generator on Earth? |
Changing mechanical energy into electrical energy |
|
What are electrons? |
Negatively charged subatomic particles |
|
What is a current? |
A steady flow of electricity |
|
What device opens and closes an electric circuit? |
A switch |
|
A flow of electrons through a conductor is called: |
A current |
|
What happens when electricity flows through an object? |
A magnetic field is created |
|
What are the two poles of a magnet called? |
North and south |
|
What is a common energy source for a circuit? |
A battery |
|
What effect will the north pole of one magnet have on the north pole of anothermagnet? |
Repulsive |
|
Which of the following is a true statement? |
Faraday built on Orsted's discoveries to describe electromagnetic induction |
|
When an electric current runs through a wire, a magnetic field is induced |
Around the wire |
|
What is the relationship between electricity and magnetism? Choose the best answer. |
They are two forms of the same basic force |
|
What might happen if transformers didn't exist? |
The electricity in your house might have an extremely high voltage |