What is the magnitude of the electric field 3m away from a 3nC charge?

Question

Physics question to find the magnitude of theelectric field 

Answer 1

E = (1/4piε₀)(q/r²)

• E = magnitude of electric field
• 1/4piε₀ = constant in free space = 8.988 x 10⁹ Nm²/C²
• q = charge in coulombs = 3 nC = 3×10^-9 coulombs
• r = distance in meters = 3

 

Plug in the numbers and compute the answer.