RoHS restricts substances in electrical equipment. Which of the following is one of those restricted substances?

RoHS restricts substances in electrical equipment. Which of the following is one of those restricted substances?

• A. Lead
• B. Water
• C. Glass
• D. Gold

Answer: (A)

RoHS restricts some hazardous substances in electrical equipment to reduce health and environmental risks. Lead is one of those substances because it is toxic and can accumulate in the environment; it has historically been used in solder and various components, so electronics are now designed to minimize or eliminate its presence. Manufacturers often switch to lead-free solders, like tin–silver–copper, to comply. The other options aren’t restricted substances under RoHS, so they don’t illustrate the standard examples of restricted materials.

RoHS restricts some hazardous substances in electrical equipment to reduce health and environmental risks. Lead is one of those substances because it is toxic and can accumulate in the environment; it has historically been used in solder and various components, so electronics are now designed to minimize or eliminate its presence. Manufacturers often switch to lead-free solders, like tin–silver–copper, to comply. The other options aren’t restricted substances under RoHS, so they don’t illustrate the standard examples of restricted materials.