Charges
Current
Circuits
Batteries
Grab Bag
100
How many different types of charges are there, what are they, and what particles are they on?
2 charges: positive and negative. Positive is on protons, negative is on electrons
100
what does voltage measure?
how much electrical potential each electron can gain
100
Which type of circuit is better able to be damaged but continue to work (at least partly)?
parallel
100
Who invented the modern battery?
Volta
100
What measure causes electric shocks to be stronger or weaker?
the current
200
Does a positive charge attract or repel a negative charge?
attract
200
what is a closed conducting loop called?
a circuit
200
what unit of energy is commonly used in measuring household energy usage?
the kilowatt-hour
200
What is the positive terminal of a battery called?
The cathode
200
what does resistance change electrical energy into?
heat/thermal energy
300
Do electric field arrows point toward or away from a positive charge?
away from
300
what do ohms measure?
electrical resistance
300
What does a fuse do when there is too much current going through it?
it melts
300
What is the purpose of the electrolyte in a battery?
To allow ions but not electrons to flow between the terminals
300
What electrical phenomenon is lightning an example of?
electric discharge
400
What types of cells use ions to rapidly transmit signals to other cells?
neurons
400
how is resistance affected by changes in the length and width of a wire?
increased length and/or decreased width increase resistance
400
A light bulb is using 0.5 amps at 220 volts. What is the resistance?
440 ohms
400
What is the gain of electrons called?
reduction
400
what is the height some falling water best compared to in a circuit?
voltage
500
What is the separation of charges caused by an electric field called?
An induced charge
500
How much water is flowing in a river (the flow rate) is best compared to what measure in a circuit?
current
500
A 70-watt light bulb is using 0.7 amps of current. What is the voltage?
100 volts
500
What is a measure of how strongly a material attracts electrons called?
reduction potential
500
What is the overall voltage of a 3-cell battery in which the reduction potentials of the two terminals are 1.4 V and 0.2 V?
3.6 volts
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