Electromagnetism Quiz True or False

1. The electric field E of a thin spherical shell with radius R and total charge Q at a distance of r < R is: ->
2. Which scenario would result in the largest electric flux? -> 2 field lines crossing a 4 × 2 cm square perpendicularly.
3. 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 35 Ω to the circuit
4. 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? -> z direction
5. A metal sphere of radius a has charge Q. What is the capacitance of the sphere? Remember that . ->
6. What’s the relationship between the direction of the electric field and the direction of the electric potential? -> They’re parallel
7. What’s the primary difference between electric potential and magnetic potential? -> Electric potential has a direction
8. If a plane wave propagates in the x-direction is polarized in the y-direction, in which direction does the magnetic field oscillate? -> z direction
9. Which is not a part of Maxwell’s equations? -> V= Q/(4πε0r) Lorentz force law
10. How would Gauss’ law be affected if magnetic monopoles were to exist? -> Gauss’ law would turn into an inverse-single law.

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