1 / 12

Chapter 6.3 Notes

Chapter 6.3 Notes. Electrical Power. Voltage causes charges to move in circuits. This movement creates work . How fast the charge does work is called Power. Power = Current x Voltage Pwr = I x V.

kalonice-cleatus
Download Presentation

Chapter 6.3 Notes

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. Chapter 6.3 Notes Electrical Power

  2. Voltage causes charges to move in circuits. • This movement creates work. • How fast the charge does work is called Power.

  3. Power = Current x Voltage • Pwr = I x V

  4. A circuit has a power supply for a laser that has a current of 15 amps when the voltage is 110 volts. What is the power? • Pwr = I x V • Pwr = 15 amps x 110 volts • Pwr = 1650 A·V or Watt

  5. When a circuit resists changes in the charge flow there are 3 equations that are used: • Pwr = I x V • Pwr = I2R • Pwr = V2/R

  6. A Current of 2.2 A has a Resistance of 5. What is the power? • We have current (I) and Resistance (R), which equation? • Pwr = I2R • Pwr = 2.22 x 5 • Pwr = 24.2 Watts

  7. A current of 2.2 A has a Voltage of 110 V, what is the power? • We have current (I) and Voltage (V), which equation? • Pwr = I x V • Pwr = 2.2 x 110 • Pwr = 242 Watts

  8. A Voltage of 110 V, has a resistance of 5. What is the power? • We have voltage (V) and Resistance (R), what equation? • Pwr = V2/R • Pwr = 1102/5 • Pwr = 2420 watts

  9. Power companies sell energy and not Power. • When you use an electrical device you pay the energy used by the device.

  10. Equation for energy and power: Energy = Power x change in time • E = Pwr x ∆t

  11. If our current is 1.5 Amps for a TV and we use a 120 V outlet to run the TV for 8 hours, how much energy will we use? • E = pwr x t • Pwr = equation? Voltage or Current • Pwr = I x V = 1.5 x 120 = 180 Watts • Convert 8 hours to seconds • E = 180 watts x 28,800 secs • E = 5,184,000 watts

More Related