S3 - Physics Test (2)

Question 1

Name each charge of the following:
- Electron
- Proton
- Neutron

Answer 1

• Negative Charge
• Positive Charge
• No Charge

Question 2

Where are each of the following found in an atom:

• Electron
• Proton
• Neutron

Answer 2

Protons & Neutrons: Nucleus

Electron: Orbiting the Nucleus

Question 3

What will happen when a charged particle enters another’s field?

Answer 3

They will experience a force acting on them causing them to repel

Question 4

Name the circuit symbol

Answer 4

A switch

Question 5

Name the circuit symbol

Answer 5

A cell

Question 6

Name the circuit symbol

Answer 6

A battery

Question 7

Name the circuit symbol

Answer 7

A lamp

Question 8

Name the circuit symbol

Answer 8

A voltmeter

Question 9

Name the circuit symbol

Answer 9

An ammeter

Question 10

Name the circuit symbol

Answer 10

A resistor

Question 11

Name the circuit symbol

Answer 11

A variable resistor

Question 12

Name the circuit symbol

Answer 12

A motor

Question 13

Name the circuit symbol

Answer 13

An ohmmeter

Question 14

Name the circuit symbol

Answer 14

A fuse

Question 15

What is it called when electrical charges are moving?

Answer 15

An electrical current

Question 16

What is a current?

Answer 16

A flow of charge in an electrical circuit

Question 17

What is resistance a measure of?

Answer 17

The opposition a circuit component has to the current

Question 18

Name the circuit symbol

Answer 18

A thermistor

Question 19

What are ohmmeters used to measure?

Answer 19

The resistance

Question 20

What is resistance measured in?

Answer 20

Ohms

Question 21

How do we use an ohmmeter to measure the resistance?

Answer 21

We can disconnect a component from the circuit and connect an ohmmeter to it before reconnecting it again.

Question 22

The resistance of a thermistor changes with…

Answer 22

Temperature

Question 23

What do lamps and heaters have in common?

Answer 23

They convert electrical energy into other forms of energy.

Question 24

What does a resistor covert electricity into?

Answer 24

Heat

Question 25

Where might you find a variable resistor in everyday appliances?

Answer 25

- Dimmer Switch - Heaters - Hair Straighteners

Question 26

What happens to the current of a circuit if there is an increase in resistance?

Answer 26

The current decreases

Question 27

What triangle may help find the voltage / current / resistance

Answer 27

V I R

Question 28

What triangle may help find the Power / Energy / Time?

Answer 28

E P t

Question 29

When there is an electrical current flowing through an electrical component there is…

Answer 29

an energy transformation

Question 30

What is power?

Answer 30

The energy transformed each second

Question 31

How can we calculate the efficiency of an electrical appliance?

Answer 31

%Eff = Po/Pi x 100

Question 32

How do opposite charges react with one another? How do similar charges react with one another?

Answer 32

They attract They repel

Question 33

What is a battery / cell?

Answer 33

A source of electricity

Question 34

What is a current?

Answer 34

A flow of charge

Question 35

What do ammeters measure?

Answer 35

The current of a circuit

Question 36

Does the current change throughout a circuit?

Answer 36

No, however this is not the case for a parallel circuit

Question 37

What do voltmeters measure?

Answer 37

The voltage

Question 38

The sum of the voltage across components in a series circuit is equal to the voltage of the supply. True or False?

Answer 38

True

Question 39

What is energy measure in?

Answer 39

Joules

Question 40

What is power measured in?

Answer 40

Watts

Question 41

What do conductors allow to move freely?

Answer 41

Electrons

Question 42

The movement of electrons through an electrical circuit is called a…

Answer 42

Current

Question 43

How do you measure voltage?

Answer 43

By connecting a voltmeter in parallel to a circuit

Question 44

What happens to the current in a parallel circuit?

Answer 44

It’s splits into different branches and combines again before going back into the supply

Question 45

What does it mean if a question asks you to find the ‘potential difference’?

Answer 45

Find the voltage

Question 46

What way does a current flow around a circuit?

Answer 46

From the Negative end of an energy supply to the positive