PHYS 121 Study Guide - Summer 2018, Comprehensive Midterm Notes - Euclidean Vector, Amplitude Modulation, Magnetic Field
12 Oct 2018
School
Department
Course
Professor
PHYS 121
MIDTERM EXAM
STUDY GUIDE
Fall 2018
Notes
May 8, 2018
8:26 PM
1. Coulomb's Law Page 1
find more resources at oneclass.com
find more resources at oneclass.com
A point charge q1= -. μC is loated at the oigi of a o-ordinate system. Another point charge q2= . μC is loated
along the x-axis at a distance x2= 8.4 cm from q1.
What is F12,x, the value of the x-component of the force that q1exerts on q2?
1.
Charge q2is now displaced a distance y2= 3.1 cm in the positive y-direction. What is the new value
for the x-component of the force that q1exerts on q2?
2.
A third point charge q3is now positioned halfway between q1and q2. The net force on q2now has
a magnitude of F2,net= 5.456 N and points away from q1and q3. What is the value (sign and
magnitude) of the charge q3?
3.
How would you change q1(keeping q2and q3fixed) in order to make the net force on q2equal to
zero?
4.
How would you change q3(keeping q1and q2fixed) in order to make the net force on q2equal to
zero?
5.
Point Charge in One Dimension
May 9, 2018
7:41 PM
1. Coulomb's Law Page 2
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
A point charge q1 = -(cid:1006). (cid:1011) c is lo(cid:272)ated at the o(cid:396)igi(cid:374) of a (cid:272)o-ordinate system. Another point charge q2 = (cid:1009). (cid:1008) c is lo(cid:272)ated along the x-axis at a distance x2 = 8. 4 cm from q1. Charge q2 is now displaced a distance y2 = 3. 1 cm in the positive y-direction. A third point charge q3 is now positioned halfway between q1 and q2. The net force on q2 now has a magnitude of f2,net= 5. 456 n and points away from q1 and q3. How would you change q3 (keeping q1 and q2 fixed) in order to make the net force on q2 equal to zero: coulomb"s law page 2. Three charges (q1 = (cid:1011) c, (cid:395)2 = -(cid:1009). (cid:1010) c, a(cid:374)d (cid:395)3 = (cid:1006). (cid:1012) c(cid:895) a(cid:396)e lo(cid:272)ated at the (cid:448)e(cid:396)ti(cid:272)es of a(cid:374) e(cid:395)uilate(cid:396)al t(cid:396)ia(cid:374)gle (cid:449)ith side d = 8. 4 cm as shown. A charge q4 = (cid:1006). (cid:1012) c is (cid:374)o(cid:449) added as sho(cid:449)(cid:374).
