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A 12 V automobile battery is connected to an electric starter motor. The current
through the motor is 250 A.
a) How much power does the motor dissipate?
b) How much energy does the battery deliver to the motor during the 26 s period?

PLEASE HELP QUICK

Respuesta :

Answer: [tex]3000\ W,\ 78,000\ J[/tex]

Explanation:

Given

The voltage of the battery is [tex]V=12\ V[/tex]

Current through the battery is [tex]I=250\ A[/tex]

(a) Power is the product of voltage and current

Power dissipates is given by

[tex]P=VI\\P=12\times 250\\P=3000\ W[/tex]

(b) Energy delivered

[tex]E=P\times t[/tex]

[tex]E=3000\times 26\\E=78,000\ J[/tex]

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