Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Electric energy

  1. May 18, 2007 #1


    User Avatar

    1. The problem statement, all variables and given/known data
    a flashlight bulb is connected across a 3.0-V difference in potential. The current through the lamp is 1.5 A.
    a. what is the power rating of the lamp?
    b. how much electric energy does the lamp convert in 11 minutes?

    2. Relevant equations

    3. The attempt at a solution
    a. P=(3.0)(1.5)
  2. jcsd
  3. May 18, 2007 #2
    Power, which is in Watts, is Joules/Seconds. Energy is described in Joules. Does this help?
  4. May 18, 2007 #3
    To make it clearer to the OP, power is energy consumed in unit time.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook