Which statement is true according to the provided information?

Which statement is true according to the provided information?

• A. Lightning is a natural display of static electric discharge.
• B. The charge on an object is determined by the materials used to produce the charge.
• C. An early instrument to determine charge polarity is the Electroscope.
• D. Selenium is an insulator.

Answer: (D)

Understanding how materials handle electric charge is key. Some substances act as insulators, resisting the movement of charge, while others are conductors and let charge flow easily. Selenium is described as an insulator because it has high resistivity, so charges don’t move freely through it in ordinary conditions. That makes the statement true in the context of basic electrical material properties. In contrast, the other statements touch on related ideas but don’t reflect this specific material property: lightning is indeed a natural discharge phenomenon, and an electroscope is a device used to sense charge and can show polarity, but the item here targets the material type of selenium, which is described as an insulator in the given information.

Understanding how materials handle electric charge is key. Some substances act as insulators, resisting the movement of charge, while others are conductors and let charge flow easily. Selenium is described as an insulator because it has high resistivity, so charges don’t move freely through it in ordinary conditions. That makes the statement true in the context of basic electrical material properties. In contrast, the other statements touch on related ideas but don’t reflect this specific material property: lightning is indeed a natural discharge phenomenon, and an electroscope is a device used to sense charge and can show polarity, but the item here targets the material type of selenium, which is described as an insulator in the given information.