20 - Potential Difference and Capacitance
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1
Potential Difference
The potential difference between two points is the work done in bringing a charge of +1 C from one point to the other
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1 volt
The potential difference between two points is 1 volt if 1 J of work is done in bringing 1 C from one point to the other
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Electric Current
a flow of electric charge
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Potential at a Point
The potential difference between a point and the Earth
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Capacitance
the ratio of the charge to voltage on a conductor
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The farad
A conductor has a capacitance of 1 farad if placing a charge if 1 C on it raises its potential by 1 V
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*Use of Capacitors
*Camera flash gun
Smooth out variations in direct current
Smooth out variations in direct current
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*Difference between Coulomb's Law and Newton's Law of Universal Gravitation
*Charge vs Mass
Attraction & Repulsion vs Only Attraction
Attraction & Repulsion vs Only Attraction
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