Question

3. a) The electric field due to a charged particle at a point 1.0 m away from it has
magnitude 81NC-1. What is the magnitude of the electric charge on the particle?
What is the magnitude of the electrostatic force on a particle having the same
charge kept at a distance of 2.0 m from it?​

Answer 1

Answer:

Using formula E=kQ/r^2

Explanation:

Here k=9*10^9 ,Q =charge and r=1 m

E=81N/C

9*10^9  * Q =81

Q= 9*10^-9 coulomb

F=kQ^2/r^2

F=EQ/4

F=7.29*10^-7/4

F=1.83*10^-7N