The CBSE Class 12 Board Exams 2025 will start on February 15, with the Physics exam scheduled for February 21. With less than ...

If the current flows in only one direction it is called direct current, or d.c. Batteries and solar cells supply d.c. electricity. A typical cell or battery may supply 1.5 V. The diagram shows an ...

Alternating current (a.c.) is an oscillation of electrons or 'back and forward' movement. One full cycle of alternating current is shown in the diagram below: ...