Chapter 8 - Electric Charge

Question 1

Electrostatic charges can be useful during paint spraying. The droplets of paint are given the same charge as they leave the sprayer. Explain why this is an advantage [2 marks]

Answer 1

• droplets repel each other / like charges repel; - droplets spread out / finer spray;

Question 2

Droplets of paint are positively charged. The object being painted is given a negative charge. Explain why this is an advantage [2 marks]

Answer 2

• object attracts droplets of paint - paint reaches back of object / obscured places - less paint wasted

Question 3

Give one hazard caused by electrostatic charges and state how the risk from this hazard can be reduced [2 marks]

Answer 3

• risk of spark / shock /damage
• related risk reduction; e.g. earth connection