1 / 10

Ohm’s Law

Ohm’s Law. Electric Currents. • Electric PE and Potential Difference • Electric Current and Resistance • Ohm’s Law, Ohmic vs. Nonohmic • Electric Circuits and EMF • Potential Divider Circuits and Sensors. How are Voltage, Current, and Resistance related?. V = I R. V. Potential Difference.

bracha
Download Presentation

Ohm’s Law

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ohm’s Law

  2. Electric Currents • Electric PE and Potential Difference • Electric Current and Resistance • Ohm’s Law, Ohmic vs. Nonohmic • Electric Circuits and EMF • Potential Divider Circuits and Sensors

  3. How are Voltage, Current, and Resistance related? V = I R V Potential Difference Volts (V) V = w/q Current I Amps (A) I = ∆q/t R Resistance R = L/A Ohms (Ω)

  4. V R I How are Voltage, Current, and Resistance related? Slope = ∆y/∆x = ∆v/∆I V/I = R V = I R Slope = Resistance

  5. Sample Problem If the current through a 20 Ω resistor is 2.5 A, what is the voltage across the resistor? • 20 V • 50 V • 70 V • 90 V

  6. Sample Problem If the voltage across a resistor is 30 V, and the current through the resistor is 6 A, what is the resistance of the resistor? • 180 Ω • 300 Ω • 5 Ω • 6 Ω

  7. Electric Power and Energy

  8. What is electric power? • Rate at which energy is used or converted How is it calculated? What are its units?

  9. What is electric energy ? • Total energy used or converted (work) How is it calculated? What are its units?

  10. How are power and energy related to each other? • (Is your electric bill for energy or power)? Energy = Pt Electric bill show kilowatt-hours (kwhrs) Therefore:

More Related