Download CBSE Class Physics 12 Pre-Board Sample Papers 2025–26 with solutions for all subjects in free PDF format. These papers are curated by experts as per the latest CBSE syllabus and exam pattern.

While standard receptacles typically use three wires -- hot, neutral and ground -- you'll occasionally find 2-prong outlets in older homes. Since this type of outlet lacks a ground connection, the ...

Dec. 19, 2025 Spending a few hours a week helping others may slow the aging of the brain. Researchers found that both formal volunteering and informal acts, like helping neighbors or relatives, were ...