(nm09) Supplementary Magnetic Problems
Polarization of EM Waves (Malus's Law)
(Ref nm06)
Unpolarized light of with a Radiant Flux (Intensity) of 6 W passes through 3 polarizing filters. What is the Radiant Flux of the electromagnetic waves after the 3rd filter if....
(a) The axis of the first is vertical, that of the second is 30 degrees from vertical, and that of the third is horizontal.
(b) The axis of the first is vertical, that of the second is horizontal and that of the third is 30 degrees from the vertical.
Fields and Waves -- Galilean Transformation
（Ref. nm06)
Case 1
:A capacitor is charged so that the electric field between the two plates is E = 4.1 MV/m in the vertical direction. There is no magnetic field. If we place the capacitor in a Sprint missle moving in the horizontal direction at v= 3400 m/s. (Mach 10) (a) What is the electric field seen by an observer on the ground as the missile passes by? (b) What is the magnetic field seen by the same observer?
Case 2
: The same capacitor is rotated so that the field is in the horizontal direction. (a) What is the electric field seen by an observer on the ground as the missile passes by? (b) What is the magnetic field seen by the same observer?
AC Circuits
(ref nm07)
An electrical circuit having a resistor and capacitor in series
is fed by power from the wall plug socket (Taiwan)
R = 15 kohm
C = 20 pF
emf in Taiwan is: f=60Hz, Vrms=120 V
(a) What is VR? (b) What is VC?