Electric Force
What is the unit of charge?
Coulomb
What are the units of the Electric Field?
Newtons/Coulomb (N/C)
What are the units for Electric Flux?
N*m^2/C
Name 2 properties of the Electric Force
1.Directed along a line joining the two particles and inversely proportional to the square of the separation distance
2.Proportional to the product of the magnitudes of the charges of the two particles
3.Attractive if the charges are of opposite sign and repulsive if the charges have the same sign
What is the direction of the Electric Field with respect to the charge?
Downward if the charge is negative, and Upward if the charge is positive
It measures how much the electric field 'flows' through an area.
Electric Flux
What is the formula used to calculate the Electric Force?
F = k *q1 *q2 / r^2
A “free” electron and a “free” proton are placed in an identical electric field. Is the following statement true or false?
Each particle is acted upon by equal-magnitude electric forces and both have the same magnitude of acceleration.
False
Calculate the magnitude of the flux of a constant electric field of 6.00 N/C in the z-direction, through a rectangle with area 8.00m^2 in the xy-plane.
48 N*m^2/C
Two charges are placed a certain distance apart such that the force that each charge experiences is 20 N. If the distance between the charges is doubled, what is the new force that each charge experiences?
5N
What is the electric field 15m away from a particle with a charge of 15mC?
6⋅105 N/C away from the charged particle
An electric flux of value 5 Nm^2/C passes through a flat surface that is perpendicular to a constant electric field of strength E = 3N/C. What is the area of the surface?
1.7m^2
You have two point charges, q1 and q2, 3m away from each other. The value of q1 is 3μC, and the force they both experience is 0.024N. What is the value of q2?
8μC
What is the value of the electric field at point C?
22.5 N/C in the −x direction
The surface in Problem 1 is now turned 90 degrees so it is parallel to the electric field of strength E = 3N/C. What is the electric flux through the surface now?
0