Electricity

Question 1

insulators definition and example

Answer 1

they do not allow electrons to flow and can leak charge slightly. These materials have a high resistance
eg: plastic and rubber

Question 2

conductor definition and example

Answer 2

they allow electrons to flow easily. These materials have low resistance

• copper
• aluminium

Question 3

series circuits are…

Answer 3

• Components connected one after another along a single conducting pathway
• if more globes are added the more resistance and there is not as much current so the lights dimmer
• Voltage will be shared in each globe

Question 4

parallel circuits are…

Answer 4

• each circuit is separately connected
• only part of the current passes through each component
• current is split up into two with half going down each branch
• each branch has its own switch
• only one globe is affected if a globe “blows”

Question 5

series circuits characteristics

Answer 5

• high resistance
• low current
• low brightness

Question 6

parallel circuits characteristics

Answer 6

• equal resistance
• shared current
• same brightness

Question 7

how is current measured?

Answer 7

it is measured using a ammeter and is measured in amperes (amps)

Question 8

what is voltage?

Answer 8

Voltage is the amount of energy that is pushing electrons around a circuit. Therefore it is a measure of the amount of energy provided by the power supply.

Voltage is measured in: volts=v

Question 9

ohms law is..

Answer 9

V= Voltage (v)
I= Current (A)
R= Resistance (Ω)

Question 10

What is resistance measured in?

Answer 10

Ohms (Ω)

using a multimeter

Question 11

What is a volometer

Answer 11

A voltmeter compares the energy or electrons before and after they travel through a load
For this reason voltmeters must be connected in PARALLEL

Question 12

How to connect a ammeter

Answer 12

Electrons must flow through an ammeter for the charge to be detected.
An ammeter needs to be in line with the rest of the circuit components, must be connected in series