Physics n00b Problem - Power Conversion

  • Thread starter Seraph
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  • #1
Seraph
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Power Conversion (Amps & Voltage)

What exactly is Power Conversion in relation to Voltage and Current?
 
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Answers and Replies

  • #2
FluxCapacitator
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If you mean, what's the power in a circuit, then the equation is:

[tex]P=IV[/tex] ,where P is power, I is current, and V is voltage.

Using V=IR, you can convert that to whatever you need.
 
  • #3
Seraph
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Well the question I have is as follows:

"A torch bulb has 3V; 0.5A written on the packet.

Calculate the power conversion for the bulb in normal use."


So do I need to use the formula - see I'm unsure with the units. Would the answer therefore be 1.5 something?
 
  • #4
Seraph
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Can Anyone Help?
 
  • #5
Galileo
Science Advisor
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V is measured in J/C, I in C/s, so IV in (J/C)(C/s)=J/s=W or Watts.
 
  • #6
Seraph
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k thanks alot
 

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