Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science Practice test

What is grounding in terms of electricity?

1. Increasing voltage

2. Isolation of electric charges

3. Removal of static electricity by conduction

4. Creation of electric potential

The correct answer is: Removal of static electricity by conduction

Grounding in terms of electricity refers to the process of connecting an electrical system or equipment to the ground, which serves as a reference point for voltage levels. The primary purpose of grounding is to provide a safe path for excess electric charge to flow into the earth, thereby preventing the buildup of static electricity and reducing the risk of electric shock or equipment damage. The process of grounding is particularly effective in the removal of static electricity by conduction. When an object with a built-up static charge is grounded, the excess electrons can flow away from the object into the earth, neutralizing the charge. This action enhances safety and promotes stability in electrical systems by ensuring that there is a consistent reference level for electric potentials. The other options involve concepts related to electrical phenomena but do not accurately define grounding. For instance, increasing voltage and creating electric potential are activities that can occur in electrical systems but do not relate to grounding's primary function of dissipation of charge. Similarly, the isolation of electric charges refers to preventing the transfer or flow of electricity rather than directing excess charges into the ground.