2: Electromagnetism

Question 1

change potentials without changing physical fields

Answer 1

gauge freedom

Question 2

if charge distributions change then ___ potential changes everywhere ___

Answer 2

scalar/instantaneously

Question 3

retarded time depends on ___ of observer even for fixed t

Answer 3

position r

Question 4

E and B are in phase and mutually ___

Answer 4

perpendicular

Question 5

poynting vector falls off as

Answer 5

1/r^2

Question 6

no magnetic dipole radiation contribution in ___ direction

Answer 6

theta

Question 7

fields generated from magnetic dipole are ___ to each other and ___ to direction of propagation

Answer 7

perpendicular/transverse

Question 8

there can be at most ___ retarded point for any given time

Answer 8

one

Question 9

___ field from point charge always perpendicular to n___ field from point charge

Answer 9

magnetic/electric

Question 10

no power radiated in direction of ___

Answer 10

acceleration

Question 11

radiated intensity ___ for relativistic particles

Answer 11

increases