PHYS 1010 Lecture Notes - Lecture 2: Electric Field
19 Jan 2017
School
Department
Course
Professor
Document Summary
Electric field(e)= force(f)/ charge (q) or k(constant(charge object 1(q1)) (charge object 2(q2))/r^2, make the q into a vector by r^ (r hat) K=(8. 99 x10^9 n/m^2 )q=(1. 602x10^-19coulomb)/r^2 (r^ radially outward from proton) If sketching we would draw an arrow pointing away from the point in middle. The closer we get to the proton, the smaller r is so the electric field is bigger ( sorter is weaker and longer is stronger) Calculations: e=(k(-e)/re-^2)r^) + (k(+e)/re+^2 r^ )( we need two terms because we are checking for both) We can look up k number in textbook. The proton would move to the plus i^ direction ( toward -e) because it is attracted to that and it would be longer since its really close to the field. = -ke/(sqroot(2m)^2(i^/2 +j^/2) + ke/(sqroot2m)^2 (-i^/sqroot2 + j^/sqroot2) =-k (8. 99x 10^9) e(1. 6 x 10^-19)/sqroot2 i^ n/c.
