Electricity Test (January 19th)

Question 1

A proton is _________ charged

Answer 1

Positively

Question 2

An electron is _________ charged

Answer 2

Negatively

Question 3

Define electricity

Answer 3

Build up and movement of charged particles (electrons)

Question 4

What do opposites do?

Answer 4

Attract

Question 5

What do like charges do?

Answer 5

Repel

Question 6

Define static

Answer 6

The buildup of charges in one spot

Question 7

What are some examples of static discharge?

Answer 7

Lightning

Being shocked

Question 8

What are the three ways of transferring static electricity?

Answer 8

Friction
Conduction
Induction

Question 9

How does friction occur?

Answer 9

By rubbing

Question 10

How does conduction occur?

Answer 10

By direct contact

Question 11

How does induction occur?

Answer 11

Indirect contact

Question 12

What is an example of friction?

Answer 12

Balloon and hair

Question 13

What is an example of conduction

Answer 13

Balloon and can

Question 14

What is an example of induction?

Answer 14

Electroscope

Question 15

Define current

Answer 15

The flow of charges from one place to another

Question 16

What are the two different currents?

Answer 16

• Alternative Current (AC)

- Direct Current (DC)

Question 17

What does direct current mean?

Who invented it?

Answer 17

• one direction

- Edison

Question 18

What does Alternating current mean?

Who created it?

Answer 18

• goes both ways

- Tesla

Question 19

What is voltage?

What is its unit?

Answer 19

-“Potential difference”
In a circuit, voltage source is the battery. If there is no potential difference, the current will NOT move.
-Volt

Question 20

What is current?

What is its unit?

Answer 20

• The flow of electrons, carries energy

- Ampere

Question 21

What is resistance?

What is its unit?

Answer 21

• a measure of how easily current moves through an object. Anything that “eats” uses current to work its resistance.
• Ohm

Question 22

Symbol for Voltage

Answer 22

V

Question 23

Symbol for Current?

Answer 23

I

Question 24

Symbol for resistance?

Answer 24

R

Question 25

The Ohm symbol is a__?

Answer 25

Omega

Question 26

What are the two charges?

Answer 26

Positive and negative

Question 27

Know the symbols for Battery, wire, switch, resistor, and blulb

Answer 27

k

Question 28

Which path will current take?

Answer 28

The path of least resistance

Question 29

If one bulb dies in a series current, then _______

Answer 29

they all die

Question 30

What happens to a fuse when to much current overloads a circuit?

Answer 30

The fuse melts to save the circuit

Question 31

What is a fuse?

Answer 31

A small wire

Question 32

What happens to a breaker when too much current overloads a circuit?

Answer 32

The breaker turns itself off to protect the circuit

Question 33

What is a breaker?

Answer 33

a switch that flips

Question 34

Does a breaker have to be replaced?

Answer 34

No

Question 35

What is Ohm’s law?

Answer 35

V=IR
(Voltage=Current x resistance)
(Volts (V)= Amperes (A) x Ohms)

Question 36

What happens when current travels through a wire?

Answer 36

It creates a magnetic field around the wire

Question 37

Define electromagnet

Answer 37

a core made into a magnet because of the flow of electric current.

Question 38

Can an electromagnet be turned off?

Answer 38

Yes, because current can be turned on and off

Question 39

Define transformer

Answer 39

A device that increases or decreases voltage

Question 40

What does a step up transformer do?

Answer 40

Increases voltage

Question 41

What does a step down transformer do?

Answer 41

Decreases voltage