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12 Cards in this Set
- Front
- Back
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How are insulating materials given electrostatic charge?
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Electrons are transfered from one material to another.
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What happens to the material that has either lost electrons or gained electrons?
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The material that has gained electrons will have a negative charge.
The material that has lost electrons has a posative charge. |
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What is charging by induction?
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A charged object can attract uncharged objects this happens because one object induces the charge in the othet.
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What is earthing and how does it work.
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You can sometimes build up charge as you touch a door or another object you may feel a shock. This happens as electrons move to cancel out the charge on you. This is Earthing.
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How is static electricity used in Insecticde Sprayers?
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Nozzle of sprayer connected to electricity supply.
Droplets all get the same kind of static charge. Droplets repel each other so the spray spreads out evenly. |
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How is static electricity used in paint sprayers?
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Nozzle of paint sprayer is conected to electricity supply.
Droplets all get the same kind of static charge so they spread out evenly. The object being painted is given the opposite charge to the paint. Less paint is wasted. |
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Charge equation
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Charge= Current multiply Times
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Potential difference calcualtion
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Potential difference= Current multiply resistance
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Power equation
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Electrical power = Current multiply Potential difference
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Energy Equation
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Energy transfered = current multiply potential difference multiply time.
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Terminal Verlocity Equation
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Weight = mass multiply gravitational field strength
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Power Equation
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power = work done÷ time taken
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