Circuits
How can you make bulb shine brighter?
Add a batter
What is a conductor?
Something that allows electricity to flow through it.
How can you create an electromagnet?
Ex. Let electricity flow through an iron nail.
What sort of activities use the most electricity?
Large appliances that create heat, such as a stove or a dryer.
2000 Watts equals how many Kilowatts?
**DOUBLE JEOPARDY**
2
What's the difference between an open and a closed circuit?
Electricity only flows in a closed circuit.
Name 3 things that conduct electricity.
Most metal objects
How does an electromagnet work?
**DOUBLE JEOPARDY**
The flow of electrons creates a magnetic field around an iron object.
After reading your electric meter over a week you notice that much more kWh are used on Saturday. Why might this be?
1. Laundry day.
2. Cooking with the stove.
Is salt water a conductor or an insulator?
Salt water conducts electricity.
What is a short circuit?
**DOUBLE JEOPARDY**
Electricity always takes the shortest path.
What is an insulator?
Something that does NOT allow electricity to flow through it.
How are electricity and magnetism related to each other?
Electric current, the flow of electrons, creates a magnetic field.
How do we measure energy?
** DOUBLE JEOPARDY**
kWh
kilowatt hours
Draw a closed circuit using the symbols we used in class. Include a battery, switch and a light bulb.
...
Electricity is the flow of __________________.
...electrons
Name 3 insulators.
**DOUBLE JEOPARDY**
Wood, rubber, plastic, glass, etc.
How did the ammeter we made in class work?
The flow of electricity cause the compass needle to move.
If a device used 10kW and is used for 10 hours, what is it's kWh?
10kw x 10hr = 100 kWh
What are 3 safety rules regarding electricity.
1. Don't stick anything in an outlet except a plug.
2. Don't mix water and electricity
3. Don't use frayed cords.
4. Don't place rugs/carpets of cords.
Etc.
What is the difference between a parallel and a series circuit?
Parallel circuits have more than one path. Series circuits only have one path.
What is a resistor? Name 2 examples.
Something that partially lets electricity to flow through it, often creating heat.
Ex. pencil led, hair dryer, oven top, portable heater, toaster
What do we call a device that detects electric current?
Ammeter
What does the Energuide label tell us? Why is this useful?
It tells us how efficient an appliance is compared to other models/brands. This lets you know how expensive it is to use.
What is a difference between a round Energuide label and a square one?