The electric field (E) at 1cm away from a point charge is 900 N/C . What...

Question

Question

The electric field (E) at 1cm away from a point charge is 900 N/C . What is the magnitude of the charge?

a. 1.0 x10-11C

b. 2.7 x10-11C

c. 9.0 x10-9C

d. 2.7 x10-9C

Answer 1

Answer #1

We know that electric field due to a point charge at a distance of r = kq/r^2

So , 900 = kq/r^2

900 = (9×10^9×q)/(0.01)^2

From here we get q = 1×10^(-11)C which is option A

Answer 2

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