Ohm’s Law
Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. This was named for German physicist Georg Ohm (1789-1854) and addresses the key principles in circuits.
If you know voltage (V) and current (I) and want to know resistance (R), remove the R in the pyramid and calculate as shown in the cookie example.
How it works:
- If the voltage (V) decreases: the current (I) decreases
- If the impedance (R) decreases: the current (I) increases
- If the impedance (R) increases: the current (I) decreases
Fun with Facts:
- Impedance changes affect pacemaker function and battery longevity.
- High impedance reading reduces battery current drain and increases longevity.
- Low impedance reading increases battery current drain and decreases longevity.
- Impedance reading values range from 300 to 1,000 ohms.
- High impedance leads will show impedance reading values greater than 1,000 ohms.
