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31 Cards in this Set
- Front
- Back
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Assume we have two particles with unequal charges distance d apart. We put a test charge in between them. What will be the two distances from each particle to the test charge?
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x and d-x
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What is the first step to solving an electrostatic force equation in 2D?
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Draw a free body diagram
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What is the second step to solving an electrostatic force equation in 2D?
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Analyze your general case vectors
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What is the third step to solving an electrostatic force equation in 2D?
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Analyze your co-linear case vectors
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What is the fourth step to solving an electrostatic force equation in 2D?
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Analyze your perpendicular case vectors
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What is the horizontal component of vector A given angle θ attached to the horizontal axis?
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Acosθ
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What is the vertical component of vector A given angle θ attached to the horizontal axis?
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Asinθ
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What is the resultant vector given the y component of the vector and the x component of the vector?
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A = sqrt(Ax^2 + Ay^2)
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What is the direction of the resultant vector given the y component of the vector and the x component of the vector?
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tan^-1[Ay/Ax]
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What does the electric field quantity represent?
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E represents the strength of the field due to charge q at charge |q0|
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What is q0?
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An imaginary, positive test charge.
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What is Ep (conceptually)?
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Electric field due to charge q at point p, assuming q0 is an imaginary positive test charge at point P
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What is Ep (formulaically)?
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Ep = F/|q0| or Ep = kq/r^2
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Is electric field a vector or a scalar?
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Vector
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What is the electric potential (or voltage) equal to? (in terms of charge)
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V = kq/r
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Is electric potential a vector or a scalar?
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A scalar
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What is the unit of electric potential?
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Volts
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What is a capacitor?
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Two conductive plates with opposite charges separated with a small distance in between them
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Is the electric field inside a capacitor uniform?
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Yes
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In which direction does electric field go?
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Positive to negative
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What is electric potential (or voltage) equal to? (in terms of electric field)
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V=Ed, d is distance, you may also use r
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How are electric potential and voltage related?
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They are the same (at least for our purposes right now. Voltage is actually electric potential difference, or CHANGE in electric potential but whatever)
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What is true about an equapotential surface?
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Voltage is the same across all points.
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On an equapotential surface, what is the relationship between electric field and direction?
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Electric field is always perpendicular to direction.
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What is work in terms of electricity?
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Electric potential energy
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Assume we have a charge and a test charge. What is the work done in moving the test charge from point i to point f?
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W(i->f) = q0∆V
W(i->f) is work done in moving the test charge from i to f q0 is the test charge, the charge that is moving ∆V is Vf-Vi, the change in electric potential To simplify: W=q∆V |
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At a far away enough distance, a spherical wave will become what?
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A plane wave
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A plane wave going through an opening/slit/sharp end will do what?
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The wave will bend ("diffract")
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When one wave encounters an object, what do we call it?
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Diffraction
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When two waves encounter each other, what do we call it?
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Interference
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On a circular representation of a wave (circules coming from a source) the circles represent what?
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The max points of the wave
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