Electrostatics II

Explain how a source charge exerts force on another charge (4-story)

An electric field is said to exist in the region of space around a _______ _______ (______ ______). The existence of an electric field is a property of the _______ ______.
When another charged object, the ______ ______, enters the electric field, an electric force (________ force) acts on it. The presence of the ______ charge is not necessary for the field to exist

1. The test particle is used to detect the existence of the ______. So it is a detector of the ______. By convention, the test particle is always a _______ _______ ______.
2. It is also used to evaluate the ______ of the field 
3. The test charge is assumed to be small enough not to disturb the _______ _______ responsible for the field

Define electric field 
Define electric field vector at a point in space and state the units/explain Magnitude E

State the formulas (explain the components) for:
E
Vector F as it pertains to Vector E

Under Gravitational Force, state
Newton's law for force
The Gravitational constant
The Gravitational Field formula and its units

Under Electrostatic Force, state:
Coulomb's law for force
Coulomb's constant k_e
Formula for the Electric field (vector) and its units

Once the field is known at some point, the force on any particle with any charge q placed at that point can be calculated from: 
vector F_e = ?
If the probe charge q is positive, what will the direction of the Electric field vector be?
If the probe charge q is negative, what will the direction of the Electric field vector be?

(a) Charge q is placed at two different points in space. The force on the charge tells us that there's an ______ ______ at these points 

(b) Label the diagram

At any point P, the total electric field due to a group of source charges equals the _____ _____ (of) ______ ______ at that point due to all the particles. State the formula

A dipole consists of a _______ and _______ charge separated by a short distance. The dipole has no _____ ______, but it does have a net ______ _______.
What is the charge value of the dipole electric field at each of these points:

Parallel-plate capacitor consists of _____ conducting plates, called _______. They are face to face with a narrow gap between them.
One electrode has total charge _____ and the other has total charge _____. 
Electric field inside the parallel-plate capacitor is constant in both ______ and ______ (state the formula for E_capacitor and the direction of the parallel plate capacitor)

Parallel Plate Capacitor
The plates are ______ compared to the distance between them. 
The cross-section view shows a small region near the center of the plates far from the edges. How do the charges end up on the inner surfaces of the plates?

_____ _____ give us a means of representing the electric field pictorially. 
The electric field vector is ______ to the electric field line at each point. 
The line has a direction that is the same as that of the ______ _______ ______
The lines at different locations point in _______ directions causing a ________ ______ field

For a positive point charge, the field lines are directed _______ _______
For a negative point charge, the field lines are directed _______ _______

Rules for Drawing Electric Field lines
Field lines are _________ to the surface
Number of field lines per unit area through the ________ surface is ________ to the magnitude of the electric field in that region 
Field lines are closer together if E is ______ and are farther apart if E is ______
Lines must begin on _______ charges and end on _______ charges. In case of an excess of one type of charge, some lines will begin or end _______ far away.
Fields cannot _______
For a conducting surface, make sure the field lines are _______ distributed (so as a point charge)

(a) Relationship between field vectors and field lines 
The electric field vector is ______ to the electric field line
The electric field is stronger where the electric field vectors are ______ and where the electric field lines are ______ _______

(b) Field lines of a positive point charge 
The field is directed away from the ______ charge, so the field lines are directed radially _______. 
The field lines are closest together near the charge, where the field strength is ________

(c) Field lines in an ideal capacitor
The field vectors are directed from the ______ to ______ plate, so the field lines are as well. 
The field is constant, so the field lines are _______ _______

The dipole occurs when two points of _____ magnitude and ________ signs are separated by a short distance. The number of the field lines leaving the positive charge equals the number terminating at the ________ charge 

For two charges +2q and -q.
Two field lines leave ____ for every one that terminates on _____

When there is no ____ _____ of charge within a conductor, the conductor is said to be in electrostatic equilibrium. Every charge in the conductor is a particle in ________. They experience _____ net force 
The charges are _____ _____ and the electric field is strongest at the ______ end of a conductor

Properties of electrostatic equilibrium: 
1. The electric field is ______ everywhere inside the conductor.
2. If an isolated conductor carries a charge, the charge resides entirely on its ______.
3. The electric field just outside a charged conductor is _______ to the surface and has a magnitude of ______
4. On an irregularly shaped conductor, the surface charge density is greatest at locations where the radius of the curvature is ________

Explain what is depicted and state the electric field value inside the void

When a particle of charge q and mass m is placed in an electric field vector E, the electric force exerted is given by vector F_e = ____
If this is the only force exerted on the particle, the net force is thus vector F_e = _____ = _____
The acceleration of the particle is therefore: a = ____
If vector E is uniform, the acceleration is _______
If the particle has a ______ charge, its acceleration is in the direction of the electric field 
If the the particle has a ______ charge, its acceleration is in the direction opposite the electric field

If an electric dipole is placed in a uniform electric field, the dipole experiences no _____ ______.
But there is a _____ _____ on the dipole that causes it to rotate.
Define the electric dipole moment
State the formula for the magnitude of the dipole moment and explain the components.
The rotation will align the dipole moment with the ______

When the dipole lines up with the field, the net torque is ______. The dipole is in ______ _______. We can say that the _____ _____ tries to align itself with the field