Answer to Question #82238 in Electricity and Magnetism for Cartoon

Question

A charged mass of 0.1g is placed inside an electrical field of 9.8 × 10^5 N/C.
Ifthe mass is in equilibrium, then what is the charge of the mass?

Answer 1

The equilibrium condition

〖F_gravity=F〗_electrical

mg=qE

So

q=mg/E=(0.1×〖10〗^(-3) kg×9.8 N/kg)/(9.8×〖10〗^5 N/C)=〖10〗^(-9) C=1 nC

Answer: 1 nC