4BSecondExamSolutions

Past Second 4B Exam Solutions:

Like for the first exam set, watch for errors, be skeptical. General headings are only approximate. It is difficult to categorize some types of problems, but they are all from past 4B exams.

CIRCUITS:

CIRCUITS01
CIRCUITS02
CIRCUITS03

CIRCUITS13
CIRCUITS14
CIRCUITS15
CIRCUITS16
CIRCUITS17

REALBATTERY:

REALBATTERY01
REALBATTERY02 (find the minus sign mistake)

MAGNETICFORCE/TORQUE:

MAGNETICFORCE05
MAGNETCFORCE06

MAGNETICFORCE07 note that in this problem the E field will make the charge move faster in its circle, but this has no effect on the period of its rotation nor on the progression of the helix, which would be at a constant rate. So this question, although at first glance might be awkward, is valid and the answer is correct. The actual trajectory of the charge would be complicated since the radius of the circle radius would be continuously expanding.)

MAGNETICFORCE08

LORENTZFORCE:

LORENTZFORCE04

AMPERESLAW:

AMPERESLAW01
AMPERESLAW02