Question 1 5/5pts
Why is it usually easier to compute the electrostatic potential V for a
given charge distribution and then find the electric field using
E = —</V than to compute it directly by applying Coulomb’s law?
o Although this is a two-step process, the equations used involve scalar
quantities that are easier to compute. Finding the electric field using
Coulomb's law method involves vector sums and integrals.
Using the Coulomb's law is a two-step process, thus computationally
more demanding.
Because the electric potential is constant
Using Coulomb's law is not accurate enough
, Question 2 10/ 10 pts
Three point charges are placed along a line:
q1 = +2uCatx = 0m
¢ = —3uCatx = 0.4m
g3 = +1pCatz = 1.0m
What is the net electrostatic force on g3 (magnitude and direction)?
0 0.057 N to the left
0.057 N to the right
0.15 N to the right
0.15 N N to the left
Why is it usually easier to compute the electrostatic potential V for a
given charge distribution and then find the electric field using
E = —</V than to compute it directly by applying Coulomb’s law?
o Although this is a two-step process, the equations used involve scalar
quantities that are easier to compute. Finding the electric field using
Coulomb's law method involves vector sums and integrals.
Using the Coulomb's law is a two-step process, thus computationally
more demanding.
Because the electric potential is constant
Using Coulomb's law is not accurate enough
, Question 2 10/ 10 pts
Three point charges are placed along a line:
q1 = +2uCatx = 0m
¢ = —3uCatx = 0.4m
g3 = +1pCatz = 1.0m
What is the net electrostatic force on g3 (magnitude and direction)?
0 0.057 N to the left
0.057 N to the right
0.15 N to the right
0.15 N N to the left
