# PhysicsFinalEquations

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 Author: victimsofadown ID: 274970 Filename: PhysicsFinalEquations Updated: 2014-05-21 12:27:54 Tags: PhysicsFinalEquations Folders: PhysicsFinal Description: PhysicsFinalEquations Show Answers:

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• Electric field strength
• q: the charge creating the field
• r: distance from the field (point in space)
1. Electric field strength of a parallel plate capacitor

• E: electric field strength
• ΔV: change in potential of the plates (power source)
• d: distance between the plates
• Potential at a point distance away from a charge
• Scalar quantity (+,-,0)
• q: central charge
• r: distance from that charge

epe=Vq (q=other charge)
• Coulomb's law
• Interaction for point electric charges
• q: charges
• r: distance separating them
• Direction determined by hand via attraction/repulsion
• If we place a charge within an electric field
• q: charge
• E: electric field strength
• Direction must be determined by hand via attraction/repulsion
2. Work is equal to - change in epe or + change in ke
• electric potential energy
• V: electric potential of a space (point distance)
• q: charge
• Work done on a charge in an electric field
• q: charge
• V: potential of the charge
• Kinetic energy (normal)
• m: mass
• v: velocity
3. Capacitance of a capacitor

• ε0: permativity of free space
• A: area of the plates of a capacitor
• d: distance between the plates
• Ohm's Law
• Potential = current x resistance
4. Equivalent resistance of resistors IN SERIES
5. Equivalent resistance of resistors IN PARALLEL
• P: power
• V: potential
• I: current
• R: resistance
• Capacitance of a capacitor
• q: charge of plates
• V: voltage difference between plates
6. Equivalent capacitor for capacitors IN PARALLEL
7. Equivalent capacitor for capacitors IN SERIES
• Energy stored in a capacitor
• U: epe
• C: capacitance
• V: voltage (potential)
• q: charge
8. Power is equal to work over time
9. Exponential decay of stored charge in a capacitor
10. Exponential decay of current across a resistor (as resistance builds)
11. Exponential growth of charge being stored in a capacitor
12. Exponential decay of current in a capacitor (as charge builds)
• Induced emf from change in magnetic field
• -: indicates that the direction opposes change
• N: number of loops
• ΔΦ: change in flux
• Δt: change in time
• Force exerted on a wire from a magnetic field
• F: force
• I: current in wire
• L: length of wire in B field
• B: magnetic field strength
• θ: angle between I and B
• Magnetic Flux
• A: surface area
• B: magnetic field
• θ: angle between magnetic field and **normal to area
• Shell's law
• θ: angle between ray and NORMAL of surface
• n: refractive index
• refractive index
• v: speed of light in substance
• c: speed of light in vaccum
• n: refractive index
• (Electromagnetic wave)
• c: speed of light in vaccum
• f: frequency of wave
• λ: wavelength
• d0: distance between object and mirror
• di: distance between image and mirror
• f: focal length
• f>0 converging lens, f<0 diverging lens
• di>0 real image, di<0 virtual image
• M:
• hi: image height
• h0: object height
• d0: distance between object and mirror
• di: distance between image and mirror
• m<0 real, inverted image
• m>0 virtual, upright image

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