What is the magnitude of the charge? Problem 18.19 Two point charges q1=+2.15nC

Question

What is the magnitude of the charge?



Problem 18.19 Two point charges q1=+2.15nC and q2=6.40nC are 0.100 m apart. Point A is midway between them; point B is 0.080 m from q1 and 0.060 m from q2. (See Image)Take the electric potential to be zero at infinity Problem 18.19 Two point charges q1=+2.15nC and q2=6.40nC are 0.100 m apart. Point A is midway between them; point B is 0.080 m from q1 and 0.060 m from q2. (See Image)Take the electric potential to be zero at infinity
Find the work done by the electric field on a charge of 2.50 nC that travels from point B to point A. Find the work done by the electric field on a charge of 2.50 nC that travels from point B to point A.
iPad 9:59 AM a session.masteringphysics.com MasteringPhysics: Hw2- potential Sign In | MasteringPhysics | Pearson figure.jpg 170x117 pixels 0 +--0.050 m+. 0.050 m 9 92

Explanation / Answer

here,

1)

let the charge be q and the disatnce from the charge be r

V = k * q/r

4.58 = 9 * 10^9 * q/r ....(1)

and

electric feild , E = k * q/r^2

12 = 9 * 10^9 * q/r^2 . ...(2)

from (1) and (2)

q = 1.9 * 10^-10 C

r = 0.38 m

the magnitude of charge is 1.9 * 10^-10 C

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