Gr. 9 Science
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What are the 3 electrical states?
What are the laws of attraction an repulsion?
Like charges repel and opposite charges attract.
An insulator is a material that doesn't allow electricity to pass through.
What is an exmple of an insulator?
A conductor is a material that allows electricity to pass through it easily.
What is an example of a conductor?
How can you charge an electroscope with an insulator? What is the charge on the insulator?
You can charge an electroscope with an insulator by using induction or conduction. The insulator will be negatively charged.
Define charging by induction.
Charging by induction is when you bring a negatively charged object near a neutral electroscope without touching it and letting the electrons flow out of a neutral ground.
Define charging by conduction.
Charging by conduction is when you touch an negatively charged object to a neutral electroscope making it negatively charged.
What are the 5 sources of electricity?
1. Piezoelectric effect
2. Thermoelectric effect
3. Chemical Reaction
4. Electromagnetic effect
5. Photovoltaic effect
What is an example of a piezoelectric effect?
Converting a dance floor in clubs into a generator.
What is an example of thermoelectric effect?
Using fire to heat up heatsinks which can power a small fan.
What is an example of a chemical reaction?
What is an example of electromagnetic effect?
Hydro electricity, Dams.
What is an example of photovoltaic effect?
Current is the flow of electric charge.
What is current measured in?
Current is measured in Amperes. (Amps)
Resistance is the electrical resistance of an object.
What is resistance mesured in?
Resistance is measured in Ohms.
Voltage is the difference of electrical potential between two points.
What is voltage measured in?
Voltage is measured in Volts.
Power is the rate at which electrical energy is transferred.
What is power measured in?
Power is measured in Watts.
How can you convert seconds into minutes?
You can convert seconds into minutes by dividing the amount of seconds by 60.
How can you convert minutes into hours?
You can convert minutes into hours by dividing the amount of minutes by 60.
Gr. 9 Science