Electromagnetism: Essentials Flashcards Preview

Physics GRE > Electromagnetism: Essentials > Flashcards

Flashcards in Electromagnetism: Essentials Deck (23)
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1
Q

Electric field of a point charge

A
2
Q

Electric dipole orientation

A

Dipole moment points from negative to positive (in opposite direction of field lines)

3
Q

Torque and potential for an electric dipole

A
4
Q

Gauss’s Law (differential and integral forms)

A

*in linear dielectric media, use permittivity of medium, not of free space

5
Q

Electric Flux

A
6
Q

Electric field and potential in a conductor (with infinitely mobile charge)

A

The electric field is zero, while the electric potential is constant.

7
Q

Where does exess charge lie in a conductor?

A

On the surface

8
Q

Point charge electric potential relative to V = 0 at infinity

A
9
Q

Definition of potential difference

A
10
Q

Electric potential of an extended body relative to V = 0 at infinity

A
11
Q

Definition of capacitance and differential relationship

A
12
Q

Parallel Plate Capacitance

A
13
Q

Electrical Energy Density (in vacuum and in medium)

A
14
Q

Definition of current

A
15
Q

Current density

A

Current per area

16
Q

Gauss’s Law for Magnetism

A

17
Q

Magnetic dipole moment defintion

A

Current times area

18
Q

Magnetic dipole torque and potential

A
19
Q

Biot-Savart Law

A
20
Q

Maxwell-Ampere Law

A
21
Q

Three types of magnetism

A

Paramagnetism: lines up with the applied field

Diamagnetism: opposes the applied field

Ferromagnetism: permanent with various domains

22
Q

Lenz’s Law

A

Current creates field to oppose change in flux

23
Q

Differential magnetic force

A