Mechanics
If an object is moving to the left (negative direction) and slowing down, what is the direction of acceleration?
To the right (positive direction)
What type of charges attract each other?
Opposite
Electric field lines end at _________ charges
What Gaussian shape would you enclose a point charge with?
Sphere
What is k equal to?
9E9 or 1/[4(pi)(epsilon0)]
True/False: Electric field lines can cross
False
What Gaussian shape would you enclose a line of charge with?
Cylinder
What is a (mechanics) example of the inverse square law?
Newton's Law of Universal Gravitation
FG = G(m1m2)/r2
What is an insulator?
A material that almost never has free-moving electrons.
What is the electric field inside of a conductor?
0
What is the electric flux if there is no charge enclosed in the Gaussian surface?
0
If you connect a lightbulb to two batteries in series, how would it compare to the brightness of a lightbulb connected to two batteries in parallel?
The bulb in series will be less bright than the bulb in parallel
What is the equation for kinetic energy?
K = (1/2)mv2
Two identical spheres with an initial charge q1 = 4C and q2 = 20C are touched together then separated. What is the charge on each sphere after separation?
12C
If you double the distance between two charges, what happens to the magnitude of electric field?
It decreases by a factor of 4.
What is the sign on an inward flux?
Negative
What rule is this? The algebraic sum of the changes in potential encountered in a complete traversal of any loop of a circuit must be zero.
Kirchoff's Loop Rule
Starting on level ground, what angle should a projectile be launched at to have the greatest displacement?
45˚
What is the value of the elementary charge e?
1.602*10-19 C
When is the potential energy of a dipole in an electric field the greatest?
When the dipole moment p is anti-parallel to the electric field E
What angle between dA and E would lead to the greatest magnitude of electric flux?
0˚ or 180˚
What rule is this?: The sum of the currents entering any junction must be equal to the sum of the currents leaving that junction
Kirchoff Junction Rule