Electricity flows only around a complete loop called a circuit. A switch closes the loop to turn a light on and opens a gap to turn it off.
17 blocks · 3 graded
17 blocks · 4 graded
16 blocks · 3 graded
18 blocks · 2 graded
15 blocks · 3 graded
9 blocks · 2 graded
← All weeks 📊 Week review →