If the force experienced by a positively charged balloon is
2.7 newtons and the electric field strength is 7.8 × 10¢ newtons/coulomb, what is the magnitude of the charge on the balloon? A. 3.5 x 10-4 B. 4.2 x 10 5 C. 3.5x 10 4 D. 7.8 x 10 5 please help me

Question

If the force experienced by a positively charged balloon is
2.7 newtons and the electric field strength is 7.8 × 10¢ newtons/coulomb, what is the magnitude of the charge on the balloon?  A. 3.5 x 10-4 B. 4.2 x 10 5 C. 3.5x 10 4 D. 7.8 x 10 5 please help me

anonymous · Answer

you can get the magnitude of the charge $q$ using the relation:
$$F=qE$$
where $F$ is the force experienced by the charged balloon and $E$ the magnitude of the elctric field