The electric field has a direction such that it
points toward negative charges and away from
positive charges. Suppose your rub a balloon
in your hair and it acquires a static charge of
−1 × 10−9 C.
What is the magnitude of the electric field
created by the balloon at a location 1 m due
north of the balloon? Coulomb’s constant is
9 × 109 N · m2
/C
2
.
Answer in units of N/C.
