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 single point charge q at a distance r is:
Zero
Q. The number of electric field lines crossing a closed surface:
Is inversely proportional to the charge enclosed.
Is proportional to the charge enclosed.
Equals zero.
Is dependent on flux.
Increases with the enclosed area.
Q. An LC circuit behaves as:
A simple harmonic oscillator
A simple harmonic transistor
A simple harmonic resistor
A simple harmonic transducer
A simple harmonic transmitter
Q. A solenoid:
Has a uniform magnetic field within
Is proportional to the number of loops of wire
Generates a magnetic field because of moving charges
A, B, C
None of the above
Q. The electric portion of an electromagnetic wave traveling in vacuum can be written as Ey = 50 cos(2π × 10-15 t – 2π x) with Ez = Ex = 0, where t is measured in seconds. What is the frequency f of the electric field?
f = 10-15 Hz
f = 2π Hz
f = 50-15 Hz
Q. How may we express the speed of light c?
Q. Maxwell’s equations yield two separate equations for the electric and magnetic fields E and B. How fast are the E waves moving in comparison to the B waves?
They are both moving at the same speed c.
B waves are moving at the speed of E divided by c.
E waves are moving at the speed of B divided by c.
B waves are moving at the speed of E divided by the wave number k.
E waves are moving at the speed of B divided by the wave number k.
Q. An ammeter measuring current is hooked up to a circuit and records an continually oscillating current. What kind of circuit is it?
RLC circuit
Solenoid circuit
RC circuit
No circuit creates an oscillating current.
LC circuit
Q. Two charges, -q and -q, are placed at an equal distance from point P. What is the electric field at P?
Zero
Q. Current density is defined as:
Electric potential over time
Magnetic potential over time
Magnetic charge over time per area
Electric charge over time per area
Current over time