Physics 2 multiple choice Flashcards
What is an electric field? (q1)
A way of measuring the force that would be present should something exist at a point
(coloumb’s law)
What is the direction of an electric field?
From positive to negative
Why is Gauss’s law better than Coloumbs?
Gauss’s is better at dealing with charge distributions
A capacitor is a device that ______ eletric potential energy and eletric charge
Stores
The capacitance of a system is recorded in what SI units?
Farad
[F]
A current begins flowing through a typical wire at room temperature?
Circle all that are correct
???
List two typs of lens aberration
1) spherical
2) astigmatism
3) chromatic
How does the inclusion of a dielectric material between the plates of a parallel plate capacitor affect the capacitance
It increases the capacitance
List two primary safety features of household wiring
1) junction BOXES
2) Fuses
Since electric force is very strong why don’t we experience it most of the time?
The net charge of most objects is zero
Suppose you have two negative point charges. As you move them farther and farther apart, the potential energy of this system relative to infinity…
Decreases
Distance decreases energy
Consider two copper wires with the same cross-sectional area. Wire A is twice as long as wire B. How do the resistivities and resistances of the two wires compare? CIRCLE ALL THAT APPLY!!!!
A) Wire A has twice the resistivity of B.
B)
