Lukew1453 Lukew1453
  • 01-05-2018
  • Physics
contestada

An automobile starter rated at 2.25 hp draws how many amps from a 10.0 V battery?

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skyluke89
skyluke89 skyluke89
  • 10-05-2018
First we need to convert the power from horsepower (hp) into watts. Since [tex]1 hp=736 W[/tex], we have
[tex]P=2.25 hp \cdot 736 W/hp=1655 W[/tex]

Then we know that the electrical power of a device is the product between the voltage and the current:
[tex]P=VI[/tex]
So if we re-arrange this equation, we get the current flowing in the circuit:
[tex]I= \frac{P}{V}= \frac{1655 W}{10.0 V}=165.5 A [/tex]
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