Circuits Summary And Series Circuits

Question 1

What does a light bulb need to shine?

Answer 1

Electric current

Question 2

What are the requirements for a circuit?

Answer 2

Conducting wires
Lightbulb
Cell

Question 3

What can be added to a circuit?

Answer 3

Measuring instruments

Switch

Question 4

What does a volt meter measure?

Answer 4

The potential difference of the battery ( ability to deliver energy)

Question 5

What do volt meters measure in?

Answer 5

Volts (V)

Question 6

What does an ammeter measure?

Answer 6

The electric current

Question 7

What does a an ammeter measure in?

Answer 7

Ampères (A)

Question 8

What is a series circuit?

Answer 8

When light bulbs are connected to the cell(s) in a “circle”

The charges have to flow straight through every single part of the circuit

Question 9

How is a volt meter connected to a circuit?

Answer 9

In parallel

Question 10

How is an ammeter connected to a circuit?

Answer 10

In series

Question 11

What are light bulbs connected in parallel?

Answer 11

Each lightbulb is individually connected to the cell

There are multiple pathways for the electrons to flow through

Question 12

What light bulbs glow brighter?

Answer 12

Ones connected in parallel

Question 13

What are the advantages of bulbs connected in parallel?

Answer 13

If one is damaged, the electrons will still flow through the circuit

Question 14

What is an electric charge?

Answer 14

An excess or deficiency of electrons

Question 15

How are charges measured?

Answer 15

Quantity of charge (Q)

Question 16

How is the quantity of charge measured?

Answer 16

In packages of electrons called coulombs (C)

Question 17

What is the function of a cell?

Answer 17

To supply energy to the charges

It is the driving force for the flow of electrons

Question 18

How do voltmeters measure the amount of energy in a circuit?

Answer 18

The difference in electric potential on either side of the cell

Question 19

What does a volt mean?

Answer 19

1 volt means that each coulomb of charge that leaves the cell is provided with 1 joule (J) of energy

Question 20

What is the total loss of energy in a circuit equal to?

Answer 20

The energy provided by the cell

Question 21

How do we measure the intensity (I) electrical current?

Answer 21

As the number of charges which flow past a point in a conductor in a certain period of time

Question 22

What are the two directions of electric current flow?

Answer 22

Conventional

Electron

Question 23

What is electron current?

Answer 23

When electrons flow away from the negative terminal of the battery to the positive terminal of the battery

Question 24

What is conventional current?

Answer 24

When the flow of the charge goes from the positive to the negative terminal of the cell

Question 25

What is resistance a measure of?

Answer 25

How difficult it is for the charges to move through the conductor

Question 26

What two things affect the intensity of current?

Answer 26

Resistance | Volts

Question 27

What is the relationship between current (I) and resistance (R)?

Answer 27

Inverse Resistance increases Current decreases

Question 28

What is the relationship between volts (V) and current (I)?

Answer 28

Direct Voltage increases Current increases

Question 29

Why do light bulbs in series glow less?

Answer 29

The electrons flow through both bulbs Bulbs are resistors More resistance means slower current Slower current means glows less

Question 30

What is the current in a series circuit like?

Answer 30

It is the same at all points in the series circuit

Question 31

What happens to the voltage in a series circuit?

Answer 31

The initial energy from the battery is divided equally amongst the light bulbs

Question 32

What are the two types of relationships?

Answer 32

Direct | Inverse

Question 33

What does adding more light bulbs in series do?

Answer 33

Makes the lights dimmer

Question 34

How do you find the total voltage in a circuit?

Answer 34

Add the voltage used by each resistor together

Question 35

What are the two types of circuits?

Answer 35

Series | Parallel

Question 36

What is the size of a charge determined by?

Answer 36

The number of electrons lost or gained

Question 37

What is an electric current caused by?

Answer 37

The flow of charges

Question 38

How many electrons are in a coulomb?

Answer 38

6,25 x 10^18

Question 39

Why do electrons flow from the negative to the positive terminal of the battery?

Answer 39

They are negatively charged an opposites attract, like charges repel

Question 40

How is the flow of electrons shown?

Answer 40

Indicated on the conducting wire An arrow pointing from the negative to positive terminal of the battery Has e- next to the arrow head

Question 41

Why was conventional current thought to be the way charges flowed?

Answer 41

Although electrons moved from negative to positive, it seemed as if the flow of charges was going the other way