KEY APPC Equations for E&M Quiz – 17 pts
1. 1 pt.
coulomb’s law
2. 1 pt.
E=F/q
3. 2 pt.
1 pt. A represents area of a surface
1 pt. encloses charge or that E field lines pass through
4. 1pt.
-integral of Edr
5. 2 pts.
qvB
BIL
6. 3 pts.
1 pt picks Biot-Savart
1 pt. dl tiny bit of length of wire
1 pt distinguishes b/w bold r displacement and non-bold r distance
(nothing for current)
7. 1 pt.
length of the Amperian loop
8. 1 pt.
calculate Magnetic field from symmetrical Current arrangements
9. 1 pt.
calculate Electric field from symmetrical Charge arrangements
10.2 pt
1 pt. induced emf
11. 2 pts.
1 pt I 1 pt r
C*m/s*N/A*m=N
N/A*m*C/s*m=N
1 pt. rate of change of flux
AP Physics C @ FHS – Electricity and Magnetism – Concepts of Equations Quiz – Name:
1. Write down the equation that allows you to calculate the force between two electrons.
2. Write down an equation that allows you to calculate the electric field strength at a distance from a point charge.
3. In Gauss’s Law, what does the A represent?
4. How is electric potential related to electric field? Hint: think calculus, think potential is related to energy, field is related to
force.
5. Show that the units for the force on a moving charged particle in an external B field
are the same as the units for the force on a current-carrying wire in an external B field
6. What’s the name of this
the equation.
law? Then, briefly explain what is meant by the variables (not the constants) in
7. In Ampere’s Law, what does the length represent?
8. When would you likely be asked to use Ampere’s law?
9. Under what conditions would you use Gauss’s law?
10. Explain what Faraday’s law
.
represents.
11. What will complete the equation for magnetic field from a long wire