electricity p.2

Question 1

source

Answer 1

A thing or a device that brings energy into the system (circuit)

Question 2

conductor

Answer 2

A material that generates electricity and allows it to flow through it (wire)

Question 3

resistance

Answer 3

the ratio of the potential difference across a load (how much energy is lost) to the current through the load.

Question 4

electrical current

Answer 4

the rate (speed) of the movement of electric charge (electron flow) in a circuit

Question 5

load

Answer 5

An electrical item that consumes all the electrical power (lightbulb consuming power to light up)

Question 6

potential difference/voltage

Answer 6

the difference in electrical potential energy when a charge is moved between 2 points in an electric circuit

Question 7

series circuit

Answer 7

circuit in which charges have only 1 path to follow

Question 8

parallel circuit

Answer 8

circuit in which charges have more than 1 path to follow

Question 9

electric current in electrical circuits

Answer 9

current is measured in Amperes in a series circuit will be the same at each point in the circuit

Question 10

voltage in electrical circuits

Answer 10

voltage is measured in volts in a series circuit is split up at each load in the circuit

Question 11

resistance in electrical circuits

Answer 11

resistance is measured in Ohms in a series circuit will be different at each load in the circuit

Question 12

static electricity

Answer 12

an imbalance of electric charge stays on the surface of an object

Question 13

current electricity

Answer 13

The controlled flow of electrons through a conductor

Question 14

factors affecting resistance

Answer 14

1. type of material - the poorer the conductor, the greater the resistance
2. cross-sectional area - the thinner the wire, the greater the resistance
3. wire length - the larger the wire, the greater the resistance
4. temperature - the higher the temperature, the greater the resistance

Question 15

3 different formals for Ohm’s Law

Answer 15

Resistance= voltage÷current
voltage=current x resistance
current= voltage÷resistance

Question 16

what is an electrical insulator

Answer 16

Something that doesnt allow electricity to flow through it

Question 17

renewable energy

Answer 17

Geothermal
Solar
Wind
Tidal (Hydro)
Biomass (if properly managed)

Question 18

non-renewable energy

Answer 18

Fossil Fuels (Natural gas, propane, coal, and petroleum)
Nuclear

Question 19

How are Ammeters connected?

Answer 19

series

Question 20

How are Voltmeters connected?

Answer 20

Parallel

Question 21

If the Ammeter/Voltmeter shows a negative number what does that mean?

Answer 21

The wires were incorrectly connected and needed to be switched.

Question 22

Combination Circuit

Answer 22

Circuit in which it has both elements of series and parallel.

Question 23

Unsafe use of circuits can cause?

Answer 23

Short circuiting

Question 24

Automatic fuses?

Answer 24

Circuit breakers

Question 25

symbol and unit for
current
resistance
voltage

Answer 25

I - Amperes
R - Ω (Ohm)
V - volts

Question 26

resistor

Answer 26

a device that reduces the current in a circuit