Physics 248: Intro to Modern Physics II

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49 Terms

1
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What is Coulombs law

(Lecture 1, Covered September 2)

<p>(Lecture 1, Covered September 2)</p>
2
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Do two similar charges repel or attract

Repel (Lecture 2, Covered September 4)

3
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Do two different charges repel or attract

Attract (Lecture 2, Covered September 4)

4
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Which force is stronger, electric force or gravity

Electric force by far. Not even close (Lecture 2, Covered September 4)

5
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What is the charge of an electron

(Lecture 2, Covered September 4)

<p>(Lecture 2, Covered September 4)</p>
6
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What is the mass of an electron

(Lecture 2, Covered September 4)

<p>(Lecture 2, Covered September 4)</p>
7
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What is the value of k in Coulomb’s constant

9×109 (Lecture 2, Covered September 4)

8
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What is the equation that relates force and electric field

F = qE (Lecture 2, Covered September 4)

9
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What are the linear charge density formulas

(Discussion 1, Covered September 8)

<p>(Discussion 1, Covered September 8)</p>
10
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What is Maxwell’s first equation (it relates electric field and enclosed charge)

(Lecture 5, Covered September 14)

<p>(Lecture 5, Covered September 14)</p>
11
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What is volumetric charge density defined as

(Lecture 6, Covered September 16)

<p>(Lecture 6, Covered September 16)</p>
12
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What is Gauss’s Law in differential form. What is the proof mathematically

It is proved via the Divergence Theorem (From Calc 3) (Lecture 7, Covered September 18)

<p>It is proved via the Divergence Theorem (From Calc 3) (Lecture 7, Covered September 18)</p>
13
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What is Maxwells Second Equation in differential form

(Lecture 7, Covered September 18)

<p>(Lecture 7, Covered September 18)</p>
14
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How is electric field related to electrostatic potential

(Lecture 8, Covered September 21)

<p>(Lecture 8, Covered September 21)</p>
15
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What is work in terms of electrostatic potential

Where phi b is the final potential and phi a is the initial potential (Lecture 8, Covered September 21)

<p>Where phi b is the final potential and phi a is the initial potential (Lecture 8, Covered September 21)</p>
16
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<p>What is the Taylor expansion of the image too 2 terms </p>

What is the Taylor expansion of the image too 2 terms

(Lecture 9, Covered September 23)

<p>(Lecture 9, Covered September 23)</p>
17
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<p>What is the Taylor expansion of the image</p>

What is the Taylor expansion of the image

(Lecture 9, Covered September 23)

<p>(Lecture 9, Covered September 23)</p>
18
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What is the energy stored in a capacitor

(Lecture 10, Covered September 25)

<p>(Lecture 10, Covered September 25)</p>
19
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What is the energy density of a capacitor

(Lecture 10, Covered September 25)

<p>(Lecture 10, Covered September 25)</p>
20
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What is current in terms of charge and time. What are the units of current

The units of current are Amperes (Lecture 11, Covered September 28)

<p>The units of current are Amperes (Lecture 11, Covered September 28)</p>
21
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What is the current density

It’s the amount of charge per unit crossing an area per unit time (Lecture 11, Covered September 28)

<p>It’s the amount of charge per unit crossing an area per unit time (Lecture 11, Covered September 28)</p>
22
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What is current density in terms of electric conductivity

(Lecture 11, Covered September 28)

<p>(Lecture 11, Covered September 28)</p>
23
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What is Ohm’s Law

(Lecture 11, Covered September 28)

<p>(Lecture 11, Covered September 28)</p>
24
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What is Kirchhoff’s Voltage Law

The sum of the electrical potential differences (voltages) around any closed network is 0 (Lecture 12, Covered September 30)

25
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What is Kirchhoff’s Current Law

The total current entering a node equals the total current leaving that node (Lecture 12, Covered September 30)

26
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What is the formula for the total charge across a capacitor that was initially discharged

(Lecture 12, Covered September 30)

<p>(Lecture 12, Covered September 30)</p>
27
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What is the formula for the magnetic field produced by a charge.

(Lecture 13, Covered October 2)

<p>(Lecture 13, Covered October 2)</p>
28
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How much work do Magnetic Fields do. What does the work done by a magnetic field imply

0 Work. This implies the velocity of the charge is conserved by the work energy theorem (Lecture 13, Covered October 2)

29
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What is Amperes Law

(Lecture 17, Covered October 12)

<p>(Lecture 17, Covered October 12)</p>
30
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What is the magnetic field outside and inside an infinite solenoid

B = 0 outside, B = mu_0 I n (Lecture 18, Covered October 14)

31
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What is Faraday’s Law of Induction

(Lecture 18, Covered October 14)

<p>(Lecture 18, Covered October 14)</p>
32
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What is Faraday’s law in differential form

(Lecture 20, Covered October 19)

<p>(Lecture 20, Covered October 19)</p>
33
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What’s the unit of inductance

(Lecture 21, Covered October 21)

<p>(Lecture 21, Covered October 21)</p>
34
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What’s the potential difference in a solenoid

where L is inductance and L = (mu0 N² * S)/(Lz) (Lecture 21, Covered October 21)

<p>where L is inductance and L = (mu<sub>0</sub> <em> N² </em>* S)/(L<sub>z</sub>) (Lecture 21, Covered October 21)</p>
35
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What is the power in a circuit

P = IV = I²R = V²/R (Lecture 21, Covered October 21)

36
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What’s the energy in an inductor

(Lecture 21, Covered October 21)

<p>(Lecture 21, Covered October 21)</p>
37
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What is mutual inductance, M, defined as (For 2 solenoids)

2 represents the bigger solenoid (Lecture 21, Covered October 21)

<p>2 represents the bigger solenoid (Lecture 21, Covered October 21)</p>
38
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What is the wave equation

(Lecture 23, Covered October 26)

<p>(Lecture 23, Covered October 26)</p>
39
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What is the speed of light in terms of the permittivity of free space, and permeability of free space

(Lecture 23, Covered October 26)

<p>(Lecture 23, Covered October 26)</p>
40
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What is electric energy density in a wave

(Lecture 25, Covered October 30)

<p>(Lecture 25, Covered October 30)</p>
41
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What is magnetic energy density in a wave

(Lecture 25, Covered October 30)

<p>(Lecture 25, Covered October 30)</p>
42
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What is the intensity of an electromagnetic wave

(Lecture 25, Covered October 30)

<p>(Lecture 25, Covered October 30)</p>
43
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What is the Poynting vector defined as

(Lecture 25, Covered October 30)

<p>(Lecture 25, Covered October 30)</p>
44
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What is Poyntings Theorem

(Lecture 25, Covered October 30)

<p>(Lecture 25, Covered October 30)</p>
45
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What is the magnetic potential

A is the “potential” vector (Lecture 25, Covered October 30)

<p>A is the “potential” vector (Lecture 25, Covered October 30)</p>
46
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What is the curl of the electric field in terms of the potential vector

(Lecture 25, Covered October 30)

<p>(Lecture 25, Covered October 30)</p>
47
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What is Fermat’s Principle

Fermat's principle says the path traveled by a light ray is the one that takes the least amount of time. Also known as the principle of least time (Lecture 26, Covered November 2)

48
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Describe the index of refraction and give the equation it’s defined as

It’s related by this equation where V_p is velocity, n is the index of refraction and c is the speed of light. n is always greater than or equal to 1 (Lecture 26, Covered November 2)

<p>It’s related by this equation where V_p is velocity, n is the index of refraction and c is the speed of light. n is always greater than or equal to 1 (Lecture 26, Covered November 2)</p>
49
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What is Snell’s Law

(Lecture 26, Covered November 2)

<p>(Lecture 26, Covered November 2)</p>