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dennis-dalton
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Whiteboards I think you should do 5 or 6 – try to use all three power equations equally 11 | 2 | 3 | 4 | 5 |
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You will need to read the section on power, do the assigned problems so that you are an expert.
Also be able to derive the expressions for power from ohms law.
P = work/time = Vq/t = VI because I = q/tThen just substitute from R = V/I
You want to make about 4-6 whiteboard questions as these are not to difficult. Try to use all the formulas.
Powerpower = work
timeDerive all eqn using:V = W/qI = q/tR = V/I
P = IV = I2R = V2
R
P: Power in WI: Current in AmpsV: Voltage in VoltsR: Resistance in Ohms
Example 1: goes here
Example 2: goes here
Demo: power supply and heating element, motor and ammeter (I can do these for you?)
Whiteboards I think you should do 5 or 6 – try to use all three power equations
equally
1 | 2 | 3 | 4 | 5 | 6
A heating element draws 2.07 A from a 12.0 volt source. What is the power it consumes?
24.8 W
Given:P = IV = I2R = V2
RP = ??V = 12.0 VI = 2.07 AR (not given)
Use P = IVP = 24.84 = 24.8 W
W
Question goes here?
answer
Given:P = IV = I2R = V2
R R
P =V =I =R =
Use
Question goes here?
answer
Given:P = IV = I2R = V2
R R
P =V =I =R =
Use
Question goes here?
answer
Given:P = IV = I2R = V2
R R
P =V =I =R =
Use
Question goes here?
answer
Given:P = IV = I2R = V2
R R
P =V =I =R =
Use
Question goes here?
answer
Given:P = IV = I2R = V2
R R
P =V =I =R =
Use