What energy transfer is happening when a person is sky diving?
Gravitational potential energy is being transferred into kinetic energy
100
What voltage do most household circuits carry?
120V
100
What happens if a switch is open?
The circuit is not complete because there is a break in the circuit (electrons can't flow through an open switch)
100
What is current?
the amount of charge flowing per second
100
What is voltage measured in?
Volts
200
What energy transfer is happening when you are playing your stereo?
electrical energy is being converted to kinetic, sound, heat and light energy
200
Many things we plug in (think phone chargers) need less than 120V. What they use to reduce the voltage?
A transformer
200
What does a circuit require besides a load and a source?
Connector cables
200
What is current measured in?
Amps/Amperes
200
What is voltage?
The energy transferred from the source to the load in a circuit
300
What is the law of conservation of mass?
energy is neither created or destroyed, just transferred from one form to another
300
What voltage to larger appliances (fridge, stove, etc) usually require?
240V
300
What are the two basic types of circuits that you built?
Series and parallel
300
The current flowing through a SERIES circuit is 2A. How much current will be flowing through each light bulb?
2A through each one
300
You have 2 lightbulbs hooked up to a 12V battery in a PARALLEL circuit. How much voltage will each lightbulb get?
12V each
400
Explain the energy transfer happening when someone is using a pulley to lift a large box.
chemical energy (in the body) is being transferred into kinetic energy (in the arm and the pulley) and then to gravitational potential energy (lifting the box)
400
What is the maximum current that can flow through a typical household circuit?
15A
400
What is a load? Provide 2 examples.
Something in the circuit that uses the energy (ie. lamp or tv)
400
You build a circuit where 3 lightbulbs are in PARALLEL. The total current of the circuit is 3A. How much current could be flowing through each lightbulb?
maybe 1A. The 3A gets split between the three lightbulbs
400
You have three lightbulbs hooked up in SERIES to a 12V battery. How much voltage might each lightbulb get?
maybe 4V each? The three lightbulbs split up the 12V
500
What are the three types of potential energy?
gravitational, chemical and elastic
500
Where are GFIs usually located and what do they do?
In areas near water such as bathroom, kitchen or outdoors. They trip the circuit breaker as soon as they measure a problem to prevent electric shock
500
What happens to a circuit if it does not have a load?
The electrical energy has no where to go, the circuit is shortcircuited and it will start a fire and/or explosion
500
What is the difference between AC and DC current?
AC: Alternating Current
DC: Direct Current
500
How do you use a voltmeter to measure voltage in a circuit?