1. Can you kill yourself with a 9 volt battery?

2. Resistivity Current Density of a conductors depends on Electric Field and the properties of the material Those properties are symbolized with the Greek letter rho and referred to as resistivity The unit for resistivity is Ohm-meters Resistivity changes with temperature

3. Zero-Resistivity Superconductors Superconductors are used to make medical scanners, magnetometers, and rail guns

4. Resistivity & Resistance Unit for Resistance is Ohms (Ω) Resistance is higher for wires of longer length Resistance decreases with larger cross- sectional areas

5. Conductance The reciprocal of Resistance Lord Kelvin called the unit the mho Officially the Siemens 1 mho = 1 Siemens

6. Ohm’s Law

7. Units

9. I-V Graph for Ohmic Material

10. Diode: Ohmic or Not Ohmic?

12. Guess the Resistors!