Question Detail
Question
A small object carrying a charge of 5 x 10^-9 C experiences a downward force of 20 x 10^-9 N when placed at a certain point in an electric field. What is the electric field at the point?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The electric field (E) is defined as the force (F) per unit charge (q).E = F / qGiven F = 20 x 10^-9 N and q = 5 x 10^-9 C.E = (20 x 10^-9 N) / (5 x 10^-9 C) = 4.00 N/C.
Hint
Recall the fundamental definition of electric field in terms of force and charge.