Ontario Grade 9 Science Class Practice Exam

What is the purpose of grounding an object?

1. To give it a positive electric charge

2. To ensure it can hold more electrons

3. To connect it to a large body capable of removing an electric charge

4. To isolate it from its surrounding environment

The correct answer is: To connect it to a large body capable of removing an electric charge

Grounding an object involves connecting it to a large body, such as the Earth, that can easily absorb and remove electric charges. This helps to prevent dangerous buildup of excess charges that can cause damage or pose a safety hazard. Options A and B are incorrect because grounding does not involve adding or storing electric charges, but rather removing them. Option D is incorrect as grounding actually involves connecting an object, rather than isolating it. It is important to ground objects to ensure their safety and prevent potential hazards caused by electric charges.