Term
| What is the electrostatic potential between two points? |
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Definition
The work done when a unit positive charge is moved from one point to another.
[image] |
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Term
| How is the work done calculated? |
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Definition
[image]
The minus sign represents the fact that work is being done on the system to move from one point to another. |
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Term
| Basic equations for capacitance between two conductors. |
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Definition
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Term
| Equation for capacitance from formula booklet? |
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Definition
[image]
Honestly you'd need the notes to get this. |
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Term
| What is current density and what is the first equation for it? |
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Definition
The change in current through a surface. It is a vector quantity, and the current that is flowing is normal to the surface.
[image]
If the conductor has a uniform cross-section then J = I/S. |
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Term
| If we consider a conducting volume, what is the equation for current density? |
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Definition
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Term
| What is the equation for Ohm's Law? |
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Definition
[image]
Each electron receives a Force F exerted on it, and n is the number of electrons in a given volume. |
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Term
What is resistivity's relation to [image]?
And where does the resistivity equation come from? |
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Definition
[image]
In a perfect conductor there cannot be an electrostatic field. |
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Term
| What is the equation for the force between two current carrying wires? |
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Definition
You consider the wires as being described in terms of the current in one being acted upon by the magnetic field generated by the other. As the result is constant no matter which one you choose for what.
[image] |
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Term
| How does the right hand rule work? |
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Definition
[image]
At position r, the current I produces a magnetic flux density dB which is given by dl x r. Thus the right hand rule works. |
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Term
| What is the magnetic flux density B produced by a long straight current carrying wire? |
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Definition
[image]
Actually, B = [image] with [image], but for air [image] is 1. |
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Term
| How will the direction of the current in the two wires affect the direction of the force? |
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Definition
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Term
| What is the equation for Magnetic flux density inside a solenoid? |
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Definition
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Term
| What is the most basic equation for magnetic flux? |
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Definition
The uniform lines of magnetic flux density B flowing normally through an area A.
[image] |
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Term
| What are the other scenarios for the magnetic flux equations? |
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Definition
If B is not uniform:
[image]
Also, if B is not normal to the surface but that isn't covered yet. |
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Term
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Definition
The quantity of field passing through an area.
[image] |
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Term
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Definition
the electromotive force is equivalent to an alternating voltage and proportional to the rate of change of flux.
[image]
The polarity is actually in the opposite direction but the minus is often accounted for at the end not during calculations. |
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Term
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Definition
The ration of the total magnetic flux linking the circuit / the current through the circuit generating the flux. The unit of inductance is the Henry(H).
[image] |
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Term
| What is an inductor and what is it's equation? |
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Definition
Self inductance put into faraday's law is the equation for an inductor:
[image] |
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