Electrostatics
Electric Field
Uniform Electric Field
Electric Potential Energy & Electric Potential (Voltage)
Ohm's Law/Circuits
100
These types of charges repel each other.
What are like charges?
100
A field of electric force surrounding a charge particle.
What is an Electric Field.
100
When the electric field is constant in magnitue and in the same direction at all points within two plates, what do call this?
What is an uniform electric field?
100
If there are two negative charges near each other, is the Electric Potential Energy postivie or negative? What does this imply?
Positive. That means that it takes positive work by an external agent to overcome the repulsive force between the two like charges as they are brought together.
100
Explain briefly voltage, current, and resistance.
What is Voltage pushes the current, Current flow through conducting wire, and Resistance restricts the flow of electrons (current).
200
If the distance between two charges is doubled, the force between them will
What is one-fourth as strong?
200
What is the significance of the density of the electric field lines about a charge?
What is the more lines per unit area (or volume) indicates a stronger Electric Field.
200
What is the magnitude of the electric field outside of two charged parallel plates?
What is zero?
200
If there is a negative charge and a positive charge, is the Electric Potential Energy of this arrangement negative or positive? What does this imply?
Negative. That means it takes negative work by an external agent to keep the charges from accelerating towards each other due to the attractive force between them.
200
A circut that has more than one path for the flow of charge.
What is a parallel circuit?
300
During charging by friction, which particles are moving between objects?
What are electrons?
300
What is the dominant field that acts on two electrons that are 10-12 m apart? Gravitational or Electric Field?
What is the Electric Field?
300
How strong is the electric field between two metal plates 5.0 mm apart if the potential difference between them is 240 V.
What is 4.8 x 104 V/m
300
What is the unit for Electric Potential? Express this unit in terms of Joules and Coulombs. Explain what this means.
The unit is the Volt. 1 Volt = 1 joule/coulomb. 1 Volt means taht a coulomb of charge passing through a battery would increase its energy by 1 Joule.
300
Melts to protect a circuit when too much current flows; must be replaced.
What is a fuse?
400
Two negative charges of 2.5 𝜇C and 9.0 𝜇C are separated by a distance of 25 cm. Find the direction and magnitude of the electrostatic force between the charges.
What is 3.24 N, Repulsive.
400
A 2.40 𝜇C charge is subject to a 3.00 mN Force due to an Electric Field. What is the magnitude of the Electric Field at the location of the charge?
What is 1.25 x 103 N/C?
400
An electron falls a distance of 25 cm in a uniform 500 N/C Electric Field. How much work is done on the electron?
What is -2 x 10-17 J?
400
What is the potential energy of two charges of -5.2 𝜇C and -8.2 𝜇C which are separated by a distance of 50 cm?
What is 7.7 x 10-1 J.
400
The above graph shows what type of current
What is Alternating Current?
500
The top part of Object B is negative. If Object A is a conductor, what will the top part of Object A be?
What is negative?
500
To produce the above electric field, what charge is letter A?
What is negative?
500
An initally stationary electron is accelerated by a uniform 640 N/C Electric Field. Find the kinetic energy and velocity of the electron after it has traveled 15 cm.
What is KE = 1.5 x 10-17 J and the v = 5.8 x 106 m/s?
500
What is the electric potential 65.0 cm from a -8.2 𝜇C point charge?
What is -1.1 x 105 V?
500
Why does a birt not die when it lands on a high voltage wire? (2 answers)
What is...
1. There is no voltage change across a wire ( 0V between the birds feet)
2. The wire is the path of least resistance, so current by passes the bird.