SOLUTION: The maximum number of volts, E, that can be placed across a resistor is given by the formula E = PR, where P is the number of watts of power that the resistor can absorb and R is

Algebra ->  Radicals -> SOLUTION: The maximum number of volts, E, that can be placed across a resistor is given by the formula E = PR, where P is the number of watts of power that the resistor can absorb and R is      Log On


   



Question 675361: The maximum number of volts, E, that can be placed across a resistor is
given by the formula E = PR, where P is the number of watts of power
that the resistor can absorb and R is the resistance of the resistor in ohms.
Find E if P = 12
watts and R = 72 ohms.

Found 2 solutions by MathLover1, Alan3354:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
+E+=+PR
if P+=+12watts and R+=+72 ohms, then
+E+=+12%2A72 W
+E+=+864V

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The maximum number of volts, E, that can be placed across a resistor is
given by the formula E = PR, where P is the number of watts of power
that the resistor can absorb and R is the resistance of the resistor in ohms.
Find E if P = 12
watts and R = 72 ohms.
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Using E = P*R --> 12*72 = 864 volts
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But that formula is not correct.
Actually P = E^2/R
--> E+=+sqrt%28PR%29+=+sqrt%28864%29
E =~ 29.4 volts
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Also, resistors don't absorb power, they dissipate it as heat.