Charge, Current and Potential Difference

Many sensors are powered using electricity.

-       Electronic sensors are designed to sense things we can’t sense.

-       Examples: Microphones sense sound waves, thermistors sense temperature.

Current is the rate of flow of charge.

Example: The current in a wire is like water flowing in a pipe. The amount of water that flows depends on the flow rate and the time.

Charge in coulombs (Q) = Current (I) x time…