In car painting the spray gun is charged positively. Therefore paint particles become positively charged. When the paint is sprayed particles repel each other. Also the car is grounded. Grounding makes the car surface to be negatively charged due to induction. Thus, it attracts positively charged paint particles.$$$$

$$$($i$)$ Explain the reason why the paint particles are charged?$$

$($ii$)$ Explain the reason what the opposite electric charges of the paint and the car provide?