Think you’ve got your head wrapped around Electromagnetism? Put your knowledge to
the test. Good luck — the Stickman is counting on you!
Q. The electric field E of a thin spherical shell with radius R and total charge Q at a distance of r < R is:
Zero
Q. Which scenario would result in the largest electric flux?
4 field lines crossing a 4 × 4 cm square perpendicularly.
2 field lines crossing a 4 × 2 cm square perpendicularly.
8 field lines crossing a 4 × 2 cm square perpendicularly.
16 field lines crossing a 4 × 4 cm square perpendicularly.
16 field lines crossing a cube of unknown dimensions.
Q. Still out stuck in the Andes mountains, Dr. Livingston builds the LC circuit. However, at the last second, he realizes he’s made a mistake and that the frequency he had been targeting is half of the original one—only 160 Hz. Recall that the tools you have are batteries with 300 V of power supply, two resistors of 35 Ω and 55 Ω each, an inductor of 10 mH and two capacitors of 25 μF and 55 μF. What does he do?
Add the resistor of 55 Ω to the circuit
Add the resistor of 35 Ω to the circuit
Add both resistors in series to the circuit
Add both resistors in parallel to the circuit
There’s nothing he can do. They’re still doomed.
Q. The electric portion of an electromagnetic wave traveling in vacuum can be written as Ey = 50 cos(2π × 10-15 t – 2πy) with Ez = Ex = 0. What is the direction of the magnetic field B?
y direction
Not enough information
x direction
Oscillates between x and y
z direction
Q. A metal sphere of radius a has charge Q. What is the capacitance of the sphere? Remember that 
.
. 
Q. What’s the relationship between the direction of the electric field and the direction of the electric potential?
The electric potential doesn’t have a direction
They’re parallel
The potential is r times greater than the field
They’re perpendicular
An electric field doesn’t have a direction
Q. What’s the primary difference between electric potential and magnetic potential?
They’re identical
Electric potential has a direction
Magnetic potential has a direction
The equipotential lines for each is perpendicular to the field from which they sprung.
Magnetic potential is calculated from flux rather than from field
Q. If a plane wave propagates in the x-direction is polarized in the y-direction, in which direction does the magnetic field oscillate?
It doesn’t oscillate.
x direction
y direction
z direction
A combination of x and y directions
Q. Which is not a part of Maxwell’s equations?
Gauss’ Law
Biot-Savart Law
V= Q/(4πε0r) Lorentz force law
Faraday’s law
Ampere’s Law
Q. How would Gauss’ law be affected if magnetic monopoles were to exist?
Gauss’ law would turn into an inverse-single law.
Gauss’ law would turn into an inverse-square law.
Gauss’ law would turn into an inverse-triple law.
Gauss’ law would turn into an inverse-quadruple law.
Gauss’ law wouldn’t be affected.