Question

1. Compute the force of attraction between a +1.60 x 10 ^-19 C charge and a -2.09 x 10^-18 C charge if they are 4.01 x 10^-10 m apart.

2. Two ball bearings with opposite charges are 1.11 m apart on the floor on the floor. What are their charges if they are attracted to each other with a force of 5.11 N?

3. Compute the electric field experienced by a test charge q =+0.80μC from a source = +0.15μC in a vacuum when the test charge is places 0.20 m away from the other charge.

4. A. 

   E = 3.4 x 10^23 N/C

   A = 2.3 x 10-2m² 

   Cos = 84⁰

B.

   E= 8.2 x 10^5 N/C 

   A = 6.1 x 10^-7m² 

   Cos = 90⁰

Answer 1

1. Answer: $1.87*10^{-8}\:\rm N$

2. Answer: $2.64*10^{-5}\:\rm C$

3. Answer: $3.38*10^4\:\rm V/m$

4. Answer: $8.2*10^{20}\:\rm N\cdot m^2/C$

5. Answer: $0\:\rm N\cdot m^2/C$