Electricity

2 Minute Drill

ELECTRICITY is…

What does electric current

flow through?

Electric Circuit

EQ: What is an electric circuit? (p. 317)ANSWER:An electric circuit is a complete, closed path through which electric charges flow.

EQ: What are the 3 essential parts of a circuit?ANSWER:

Energy SourceDefinition:

Examples (3):

LoadDefinition:

Examples (3):

EQ: How are series and parallel circuits similar and different?

Series Parallel

EQ: What factors affect the amount of electric current through a circuit?

Voltage (p. 307)Definition:

More info:

Resistance (p. 308-309)Definition:

More info:

A

D

C B

Challenge: How would the other bulbs be affected if bulb one of the bulbs burned out?

1. If bulb A burned out…

2. If bulb B burned out…

3. If bulb C burned out…

4. If bulb D burned out…

EQ: What happens when there is too much electric current moving through a circuit? (p. 320-321)

• Too much current can cause wires to heat up, melt, and start fires.

• Fuse – when the current gets too high, a strip of metal melts and breaks the circuit.

• Circuit breaker – A switch that opens if the current is too high. A strip of metal heats up and bends, opening the circuit.

Circuit breaker – A switch that opens if the current is too high. A strip of metal heats up and bends, opening the circuit.

ELECTRIC MATH!

Power Triangle

ELECTRIC MATH!Find the voltage of wire with a current of 6A and a resistance of 12Ω

ELECTRIC MATH!Find the resistance of TV that uses 200V and a current of 2A.

ELECTRIC MATH!Find the current of a fan that uses 120V and a resistance of 30Ω.

ELECTRIC MATH!Find the power of a Xbox that uses 120V and a current of 6A.

ELECTRIC MATH!Find the power of a light bulb with 10V and a current of 12A

ELECTRIC MATH!Find the voltage of a printer that uses 300W of power and a current of 25A

– What happens to the charge of an object that loses electrons?

– What happens to the charge of an object that gains electrons?

– What happens to the charge of an object that gains protons?

– An atom has 26 protons and 23 electrons. What is its overall charge?

– Another atom has 47 protons and 52 electrons. What is its overall charge?

– Will these atoms attract or repel each other?

– If you rub a metal rod with a piece of silk, the rod becomes negatively charged. This means that the silk must be…

– What is the difference between static and current electricity?

Suppose you have four bulbs in a series circuit. If you were to add five more bulbs in series with these four, what would happen to the brightness of the bulbs?

Suppose you have four bulbs in a parallel circuit. If you were to add five more bulbs in parallel with these four, what would happen to the brightness of the bulbs?

1. Why are loads necessary in a circuit? 2. What happens when there are too many

loads in a parallel circuit?

– In your own words, describe how electricity is produced at a

power plant.