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Homework Statement
The figure below shows a test charge q between the two positive charges. Find the force (in Newtons) on the test charge for q = -4 µC.
a)Give a positive answer if the force is to the right and a negative answer if the force is to the left.
b.)For the previous question, find the electric field (in Newtons/coulomb) at the position of test charge. Again, supply a positive value if the electric field points to the right and a negative value if it points to the left.
Homework Equations
F=ke|q1|q2|/r^2
E=F/qo
The Attempt at a Solution
a)F21=ke(2x10-6)(4x10-6)/(3x10-2)^2 = 80 to the left
F23=ke(4x10-6)(3x10-6)/(2x10-2)^2 = 269.7 to the right
F2 = 190
b)E=190/-4x10-6 = -4.75e7
Homework Statement
How much work (in joules) is done in moving a charge of 2.5μC a distance of 22 cm along an equipotential at 9~V?
Homework Equations
W=-change in PE, where PE = q(change in volts)
The Attempt at a Solution
W=-2.5e-6(9)= -2.25e-5 J