Question

Assignment -1 PHY 214 lanuary 16,2019 Due Date: January 23,2018 1. Write the units for the following: (a) Charge (b) Coulomb's Force (c) Coulomb constant ke … (e) Electric Field . rse thas 2. Point charges A and B are separated by 3.0m. Find the position as measured from A at which net force acting on a charge placed at P is zero. 4.0pC

Answer 1

Charge - Coulomb Coulomb's force - Newton Coulomb constant - Newton meter^2 coulomb^-2 elementof_0 rightarrow Coulomb^2 Newton^-1 meter^-2 Electric field - Newton coulomb^-1 Let say, required distance is x from A. Force F_Ap = k times q times 4 times 10^-6/x^2 Force F_Bp = k times q times 8 times 10^-6/(3 - x)^2 If net force is zero: it means F_Ap = F_Bp k times q times 4 times 10^-6/x^2 = k times q times 8 times 10^-6/(3 - x)^2 (3 - x)^2 = 2x^2 3 - x = squareroot 2 x x = 3/squareroot 1 + squareroot 2 = 1.24 m