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33 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Linear Charge Density |
Q=lambda*L |
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Electric Potential Energy of 2 point charges |
U=(K*Q1*Q2)/r
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Electric Potential energy |
U = q*V |
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Potential of a point charge |
V= (K*Q)/r |
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Potential from a continuous distribution of charges |
V= integral (K*dQ)/r |
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Electric potential energy from Force |
deltaU= -integral(F*dr) = -integral (Fx +Fy +Fz) |
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Potential Difference from Electric Field |
deltaV= -integral(E*dr) = -integral (Ex+Ey+Ez) |
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Force from Electric Potential Energy |
F= -gradU= - partial derivatives with respect to x,y,z |
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Electric field from Potential Difference |
E= -gradV= - partial derivatives with respect to x,y,z |
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Charge of a Capacitor |
Q=C*deltaVc |
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Electric Potential Energy of a Capacitor |
Uc = (1/2)*Q*deltaVc |
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Current |
I = deltaQ/delta t = dQ/dt |
Charge/unit of time |
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Voltage of a Resistor |
deltaVr = IR |
Ohm's Law |
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Power of a Resistor |
Pr = IdeltaVr = (I^2)R = (deltaVr^2)/R |
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How are voltages in series related? |
Vs = V1 + V2 +... |
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How are voltages in parallel related? |
Vp = V1 = V2 = .... |
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How is current in series related? |
Is = I1 = I2 = .... |
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How is current in parallel related? |
Ip = I1 + I2 = ... |
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How are resistors in series related? |
Rs = R1 + R2 +..... |
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How are resistors in parallel related? |
Rp = (1/R1 +1/R2 +...)^-1 |
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How are Capacitors in series related? |
Cs = (1/C1 + 1/C2 + ...)^-1 |
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How are Capacitors in parallel related? |
Cp = C1 + C2 + ... |
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What is the voltage of a non-ideal battery? |
deltaV = E +- Ir |
+ for charging, - for discharging |
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For an RC circuit what is the equation for the time constant? |
tau = RC |
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For an RC circuit what is the equation for charge as a function of time? |
Q(t) = Q0*e^(-t/RC) |
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For an RC circuit what is the equation for current as a function of time? |
I(t) = I0*e^(-t/RC) |
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If you have a positive charge, in what direction will it go in regards to voltage? |
High to low voltage |
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If you have a negative charge in what direction will it go in regards to voltage? |
Low to high |
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The electric field points in what direction in regards of voltage? |
Points in the direction of decreasing voltage (downhill) |
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What is Kirchoff's Loop Law? |
The sum of all potential differences around a closed path is 0. |
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Equipotential lines are perpendicular to what? |
Electric field, Electric Force, and acceleration. |
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Kirchoff's Junction Law |
The sum of the current in equals the sum of the current out. |
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In resistors do electrons slow down? |
No, they do not slow down and it's their potential energy that decreases and is turned into heat. |
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