B.5.1—Cells provide a source of emf Topic Practice
B.5.1—Cells provide a source of emf Topic Practice
Learn to define emf precisely and use simple circuit information to identify the energy transferred per unit charge by a cell.
How this is tested
- state emf as energy transferred per unit charge and give the correct unit as volts or J C^-1
- read a simple circuit diagram or data table to state the cell emf from the labelled potential difference