Electricity Unit Test

Question 1

Define discharge

Answer 1

An electric discharge is the release and transmission of electricity in an applied electric field through a medium such as a gas

Question 2

Define circuit diagram

Answer 2

A diagram that uses standard symbols to represent the components in an electric circuit and their connections

Question 3

Define load

Answer 3

A resistor or any other device that transforms electrical energy into heat, motion, sound, or light

Question 4

Define source

Answer 4

A device delivering energy to a system

Question 5

Define amps

Answer 5

The unit of electric current, equivalent to one coulomb per second.

Question 6

Define volts

Answer 6

The unit for potential difference; equivalent to one joule (J) per coulomb (C).

Question 7

Define ohms

Answer 7

The unit for resistance, equivalent to one volt per ampere (V/A).

Question 8

Define current

Answer 8

The flow of electrons through a complete circuit of conductors. It’s used to power everything.

Question 9

Define potential diffrence

Answer 9

(Voltage) The difference between the electric potential energy per unit of charge at two points.

Question 10

Define resistance

Answer 10

A measure of opposition to current flow in an electrical circuit.

Question 11

Define series ciruit

Answer 11

A circuit in which there is only one path along which electrons can flow.

Question 12

Define parellel circuit

Answer 12

A circuit in which there is more than one path along which electrons can flow.

Question 13

What are circuits

Answer 13

Loops where electrical energy moves a source through loads and back

Question 14

What are items that use electrical energy called

Answer 14

Loads

Question 15

What could be a source of electrical energy

Answer 15

Battery (DC) or a household plug (AC)

Question 16

Do electrons get used up

Answer 16

No, energy doesn’t get used up, it only transmitted into other forms.

Question 17

How many volts is a long line and a short line and what’s it called

Answer 17

It’s called a cell and it has 1.5V

Question 18

What are some rules about curcuit diagrams

Answer 18

You always need a source, cables and wires always need to be straight lines, wires shouldn’t cross over each other

Question 19

What is a cell/battery/source used for

Answer 19

To power your curcuit

Question 20

What is a wire used for

Answer 20

Carries the power/electrons through the system

Question 21

What is a LED used for

Answer 21

Gives off light and turns electrical energy dircetly into light

Question 22

What is a switch used for

Answer 22

Controls the system and allows you to open and close your system

Question 23

What is a resistor used for

Answer 23

Resists some of the flow of electrons

Question 24

What is a ammeter used for

Answer 24

Mesures amps and measures the current at any point

Question 25

What is a voltmeter used for

Answer 25

Measures the amount of volts and measures the potential difference

Question 26

What's the symbol for a ammeter

Answer 26

A wire with a circle going through it that has a A in the middle

Question 27

Whats the units for current, potential difference, and resistance

Answer 27

Amps, V, and Ohms

Question 28

Whats the instument of measure for current, potential difference, and resistance

Answer 28

Ammeter, voltmeter, and ohmeter

Question 29

As more bulbs are added to a series curcuit what will happen to the brightness

Answer 29

It decreases

Question 30

As more bulbs are added to a series curcuit what will happen to the current after each load compaired to the total current

Answer 30

Compaired to the total current, it's the same, but after more loads are added it decreases

Question 31

As more bulbs are added to a series curcuit what will happen to the TOTAL potential difference

Answer 31

It stays the same

Question 32

As more bulbs are added to a series curcuit what will happen to the total potential difference across each load compaired to the total potential differnce

Answer 32

It splits between each load

Question 33

As more bulbs are added to a series curcuit what will happen to the total resistance compaired to the resistance across each load

Answer 33

It will increase

Question 33

As more bulbs are added to a paralell curcuit what will happen to the brightness of the bulbs

Answer 33

They will stay the same

Question 34

As more bulbs are added to a paralell curcuit what will happen to the current after each load compaired to the total current

Answer 34

It splits

Question 35

As more bulbs are added to a paralell curcuit what will happen to the potential difference across each load compaired to the total potential difference

Answer 35

It will stay the same

Question 36

As more bulbs are added to a paralell curcuit what will happen to the total resistance compaired to the resistance across each load (each path)

Answer 36

It will decrease

Question 37

Compare the current after each load with the current after the battery in a series circuit. Explain

Answer 37

It stays the same because, it's all apart of the same path. What's traveling at one point is travelling at another.

Question 38

Compare the potential difference after each load with the current after the battery in a series circuit. Explain

Answer 38

It splits, because the electrons will go past each load and drop off some electrons at each load.

Question 39

Compare the potential difference across each load to the total potential difference, in parallel. Explain.

Answer 39

It stays the same, because each electron can only go down one path, so it needs to drop off all its energy in one bulb

Question 40

Compare the current through each load with the current leaving the battery, in parallel. Explain

Answer 40

It splits, because each path needs electrons to flow, and they will all meet up at the same point.

Question 41

What happens to the brightness in a series curcuit

Answer 41

As more loads are added, brightness decreases

Question 42

What happens to the current in a series curcuit

Answer 42

Current will stay the same throughout the curcuit, but it will slow down whenever more loads are added

Question 43

What happens to the potential difference in a series curcuit

Answer 43

The voltage will split between the loads (if equivelent loads)

Question 44

What happens to the resistance in a series curcuit

Answer 44

It will increase with more loads

Question 45

What happens to the brightness in a parallel curcuit

Answer 45

It will stay the same no matter how many loads you add

Question 46

What happens to the current in a parallel curcuit

Answer 46

The total current will increase with every load added

Question 47

What happens to the potential difference in a parallel curcuit

Answer 47

The voltage down paths and the total will be the same

Question 48

What happens to the resistance in a parallel curcuit

Answer 48

Decreases with more paths

Question 49

What's an advantage to a parallel curcuit

Answer 49

If one lightbulb goes out, the whole thing will still work

Question 50

What's a disadvantage to a parallel curcuit

Answer 50

If you plug too many things in, it may blow up

Question 51

What's the formula for Ohm's law

Answer 51

V=IR

Question 52

What are some factors that affect resistance

Answer 52

The length of the wire, number of loads, material of the wire, type of curcuit, temperture of the wire (hotter = slower), and the diameter of the wire

Question 53

What does GRASS stand for

Answer 53

Given, requested, arrange, substitute, statement