Which of these is a source of direct current (d.c.)? Put a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 1 - 2016 - Paper 1

Direct current (d.c.) is a type of electrical current that flows consistently in one direction. Unlike alternating current (a.c.), where the flow of electricity reverses direction periodically, the current in a d.c. system remains unidirectional, maintaining a constant polarity over time. This is often used in low-voltage applications such as in batteries, electronics, and equipment requiring a stable and consistent power supply.