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21 Cards in this Set
- Front
- Back
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Mili coloumb |
1mC (1x10^-3) |
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Micro coloumb |
1uC (1x10^-6) |
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Nano coloumb |
1nC (1x10^-9) |
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Poco coloumb |
1pC (1x10^-12) |
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Neutral objects |
Have the same number of protons and electrons |
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Charged object |
Have unequal protons and electrons |
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Positively charged |
More protons than electrons |
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Negatively charged |
More electrons than protons |
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Coloumb |
Unit for charge (1c=1coloumb) |
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Polarisation |
Separation of charge in on object. By rubbing an object a charge is created through friction. By bringing the charged object near to a neutral object, the charges in the neutral object separate and there is an attraction.
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Conservation of charge |
Charge can move from one object to another. If two charged objects are brought together, electrons flow form an excess to less until the charge is evenly distributed. (Only if same shape and surface area) |
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New charge (formula) |
New charge=total charge/no. of objects. |
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Change in charge formula |
🔺Q=Qf-Qi |
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Number of electrons transferred formula |
No. of e- = Q/1,6x10^-19 |
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Law used |
Law of conservation of charge |
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Given no. of e- and asked for Q |
Q= no. of e x (1.6x10^-19) |
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Electrostatic force |
Electrostatic force occurs between objects which are charged. This force was investigated by Charles Coulomb. This force depends on the magnitude of the charge and the distance between the charged objects. |
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Coulomb Law |
The force of attraction or repulsion between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between their centres. |
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Directly proportional |
As one variable increases the other also increases. As the charge increases the force also increases. F🐟Q1Q2 |
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Inversely proportional |
As the one variable increases the other decreases. As the distance increases the force between the spheres decrease. F🐟1/r^2 |
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Force formula |
F= (KQ1Q2) / r^2
K=9x10^9 F-force of attraction or repulsion (Newton-N) R-distance (in m) |
