Circuits II

A Model of a Current 
When the two capacitor plates of a parallel-plate capacitor have been connected with a metal wire (______): 
1. The net charge of each plate will ________ -the capacitor has been _______
2. The connecting wire gets _______
The motion of charges through a material is called a _______

The charges that move in a current are called the _____ ______. The charge carriers in metals are _______. It is the motion of the _______ _______, which are free to move around, that forms a current in the metal. A semiconductor is an intermediate case, with relatively few charge carriers, which can be either _______ or ______. In ionic solutions, the ______ ______ are ions that can be positive and negative

Because the wire is connected between two points of _______ _______. There is an electric field in the wire pointing from ______ to ______ potential and it pushes _______ through the wire 
The potential difference creates the ______ ______ that drives the current in the wire. Eventually, the plates will be completely discharged, resulting in the loss of what 3 things?
Label the potentials of each side

The light bulb cannot ______ electrons nor ______ electrons. Every _______ entering the light bulb is matched by an ______ leaving the light bulb, and thus the currents on either side of a light bulb are ______

Electric current that flows through a light bulb is analogous to _____ that flows through a ______: 
Both water current and electric current are doing ______
The amount of ______ (electrons) leaving the ______ (light bulb) equals the amount of ______ (electrons) entering the ______ (light bulb).
Our first conclusion-Law of conservation of current states:

The amount of water leaving the turbine equals the amount ______; the number of electrons leaving the bulb equals the number ________

Current is define as the motion of _______. It is the _______ that flow, not the ______. Current is the flow. Define current (mathematically)

The current (I) is due to the motion of charges in the ______ ______. We imagine an area across the wire through which the charges move. In a time Δt, charge Δq moves through this area 

The current direction in a wire is from ________ to _______ potential, or in the direction of the ______ _____. It is conventional to assign the current the same direction as the flow of _______ ______. Current is measured in (_____/_____), which we define as an _______ (__).
State the equality of those units
Household currents are typically ~ 1A or 1 amp
For a steady current, the total amount of charge is delivered by a ______ during a ______ _____. 
ΔQ = ____

The zig-zag line represents the motion of charge carrier in a conductor. The net drift speed is ______. The sharp changes in direction are due to _______. The net motion of electrons is opposite the direction of the ______ ______. The random motion of the charge carriers is modified by the _____, and they have a drift velocity ________ the direction of the electric field

The total charge is the number of ______ multiplied by the _______ per ______, (__)
ΔQ = _______ (explain the components *2)
Define drift speed, v_d, and state the formulas for: 
v_d = ______
ΔQ = ______
I_avg = _____ = _____

The current density (J) in a conductor is the _____ per unit ______: 
J Ξ _____ = ______
Units: ______
The current density is in the direction of the _______ ______ ______

Define a Junction and state the mathematical requirements for its law of conservation
Formally name and explain the law
Label the diagram

The inner workings of a battery act like a _______ ______ between the two terminals. Charges are removed from the _______ terminal and "lifted" to the _______ terminal. Once a charge reaches the _______ terminal, it can flow downhill through the wire until it reaches the ________ terminal again. The flow of charge in a continuous loop is called a ________ ________.

Once the charges reach the ______ terminal, they "____ _____" through the wire back to the ______ terminal. 
The charge escalator "lifts" charges from the ______ terminal to the _______ terminal. Charge (q) gains energy ΔU = ______
Identify the positive and negative terminal (state formula for U at each), where U is increasing, where it is decreasing and what is the direction of I 

The charge escalator in a battery is powered by ______ _____ (explain-2-story).
A dead battery is one in which the supply of chemicals has been ________.
The potential difference established by a device, such as a battery, that can actively separate charge is called an _____ (__) and its units are _____

A source of emf (________ force) is an entity that maintains the ______ ______ of a circuit. The _______ will normally be the source of energy in the circuit.
_______ are also sources
A capacitor ______ separated charges, but has no means to do the ________. A charged capacitor has a(n) ______ ______ but not a(n) _______
The emf (ε) sources supplies _____ it does not apply a force to the ______

Briefly explain whether or not an emf is a force in the classical sense (tension, gravity, etc). Which qualify as an emf and why: battery vs capacitor