S2 - Electricity (complete)

Question 1

Static electricity

Answer 1

Build-up of stationary electric charges

(stationary = not moving)

Question 2

Applications of static electricity

Answer 2

Photocopiers, laser printers, electrostatic spraying

Question 3

Electric charge

Answer 3

Something which produces electric forces; can be positive or negative

Question 4

Opposite charges _______.

(positive and negative)

Answer 4

attract

Question 5

Like charges _______.

(e.g. positive and positive)

Answer 5

repel

Question 6

Proton

Answer 6

Subatomic particle with a positive charge

Question 7

Electron

Answer 7

Subatomic particle with a negative charge

Question 8

Symbol for wire

Answer 8

Question 9

Symbol for a cell

Answer 9

Question 10

Symbol for a battery

Answer 10

Question 11

Symbol for a power supply

Answer 11

Question 12

Symbol for a switch

Answer 12

Question 13

Symbol for a bulb

Answer 13

Question 14

Symbol for an ammeter

Answer 14

Question 15

Symbol for a voltmeter

Answer 15

Question 16

Symbol for a resistor

Answer 16

Question 17

Symbol for a fuse

Answer 17

Question 18

Current electricity

Answer 18

Flow of moving charges

Question 19

Conductor

Answer 19

Material which can conduct electricity

Question 20

Insulator

Answer 20

Material which cannot conduct electricity

Question 21

Examples of conductors

Answer 21

Metals, graphite

Question 22

Examples of insulators

Answer 22

Non-metals

(e.g. glass, rubber, wood, etc.)

Question 23

Voltage source

Answer 23

Provides energy to charges to make them move, e.g. cell or battery

Question 24

Circuit

Answer 24

Continuous path of conductor from one end of a voltage source to the other

Question 25

Voltage

Answer 25

Energy given to the current by a cell/battery

Question 26

Volts (V)

Answer 26

Units for voltage

Question 27

Voltmeter

Answer 27

Used to measure voltage

Question 28

Current

Answer 28

Number of charges passing by in one second

Question 29

Amps (A)

Answer 29

Units for current

Question 30

Ammeter

Answer 30

Used to measure current

Question 31

Series circuit

Answer 31

Circuit with only one path for the current to follow

Question 32

Parallel circuit

Answer 32

Circuit with more than one path for the current to follow

Question 33

What is the rule for current in a series circuit?

Answer 33

I_s = I₁ = I₂ = …

Current through each component, e.g. bulbs, is equal to current through supply.

Question 34

What is the reading on A₁?

Answer 34

3 A

(series circuit = all current readings will be the same)

Question 35

What is the rule for voltage in a series circuit?

Answer 35

V_s = V₁ + V₂ + …

Voltage across each component, e.g. bulbs, adds up to to voltage across supply.

Question 36

What is the reading on V₁?

Answer 36

6 V

(series circuit = voltage across components adds up to voltage across supply , 9V)

Question 37

What is the rule for voltage in a parallel circuit?

Answer 37

V_s = V₁ = V₂ = …

Voltage across each component, e.g. bulbs, equal to voltage across supply.

Question 38

What is the reading on V?

Answer 38

6 V

(Parallel circuit = voltage the same at all points)

Question 39

What is the rule for current in a parallel circuit?

Answer 39

I_s = I₁ + I₂ + …

Current through each component, e.g. bulbs, adds up to to current through supply.

Question 40

What is the reading on A₁?

Answer 40

2 A

(Parallel circuit = current through componenets adds up to current through supply, 5 A)

Question 41

Which pair of metals gives the highest voltage when used to make a lemon battery?

zinc iron copper lead

Answer 41

Zinc and copper