Charged Up!
Two objects with the same sign of net charge do this.
What is repel?
This material, inserted between capacitor plates, increases capacitance by reducing the effective electric field.
What is a dielectric?
This quantity describes electric potential energy per unit charge.
What is electric potential (voltage)?
You will do this if you don't pay attention to Holloway.
What is fail?
(500) A particle of charge Q moving along the x-axis with an electric potential given by V = Ax^2 - Bx has an equilibrium point at this x-value.
What is B/2A?
The equation indicating that electrostatic force is proportional to charge magnitude and inversely proportional to the square of the distance between charges has this name.
What is Coulomb's law? (F = kq1q2/r^2)
Increasing the plate area of a parallel-plate capacitor causes the capacitance to do this.
What is increase?
When a positive charge moves naturally from high potential to low potential, its electric potential energy does this.
What is decrease?
This quantity, measured in newtons per coulomb, describes electric influence at a point.
What is field strength?
(500) The electric field within a conducting shell that has inner radius A, outer radius B, and enclosed charge Q has this magnitude.
What is zero?
The magnitude of the electrostatic force between a proton and electron becomes this multiple of the original when the distance between them is halved twice.
What is 16?
If the separation between capacitor plates is doubled while connected to a constant voltage source, the magnitude of the electric field changes by this factor.
What is 1 (unchanged)?
An electron accelerated through a potential difference of 12 volts gains this much kinetic energy.
What is 12 electron-volts?
This SI unit describes capacitance.
What is the Farad?
A solid nonconducting sphere of radius R with charge density that varies with radius according to rho = rho0(1-r^2/R^2) has an electric field magnitude of this when at a distance less than R from the center.
What is rho0/epsilon0(r/3-r^3/5R^2)?
An electron moving perpendicular to an electric field emanating from a nearby positive point charge at a speed greater than its orbital speed will undergo this shape of motion.
What is a spiral (helix)?
A charged capacitor is disconnected from a battery and then its plate separation is increased. The stored electrical energy does this.
What is increase?
The electric potential of an oddly shaped conducting surface in electrostatic equilibrium has this property.
What is a constant value?
This scientist led experiments to demonstrate electric field lines and defined the relationship between electromotive induction and changing magnetic fields.
Who is Faraday?
(5000 points) A spherical capacitor consists of an inner conducting shell with charge Q and radius A and an outer conducting shell with charge -Q and radius B. The capacitance is equal to this value when the permittivity of the dielectric between the plates varies according to epsilon = epsilon0(1+r/A)
What is 4abpi*epsilon0/(b-a-aln((a+b)/2a))?
Three positive and three negative point charges alternated on the vertices of a regular hexagon with will create an interior electric field that mimics this shape.
What is a six-sided star (or equivalent) (with reference to curvature)?
A parallel-plate capacitor consists of two aligned square plates of side length L and separation D. One plate slides sideways relative to the other at constant speed v, causing the capacitance to change at this rate.
What is -epsilon0Lv/D?
A system of three positive charges of magnitude Q, 2Q, and 3Q arranged in an equilateral triangle of circumradius 1 contains this much electric potential energy?
What is 11kQ^2root3?
This electric constant represents the ability of a vacuum to allow electric field lines to pass through it.
What is free-space permittivity?
(5000 points) The magnitude of the electric field a distance A along the perpendicular bisector of a rod of length L with evenly distributed charge Q is this quantity.
What is kQ/root(a^4+(La/2)^2)?