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Automotive Technology

7th Edition
ERJAVEC + 1 other
Publisher: Cengage,
ISBN: 9781337794213

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Chapter
Section
FindFindarrow_forward

Automotive Technology

7th Edition
ERJAVEC + 1 other
Publisher: Cengage,
ISBN: 9781337794213
Chapter 15, Problem 2ASRQ
Textbook Problem
49 views

Technician A says that a 12-volt light bulb that draws 12 amps has a power output of 1 watt Technician B says that a motor that has 1 ohm of resistance has a power rating of 144 watts if it is connected to a 12-volt battery. Who is correct?

  1. Technician A

  • Technician B
  • Both A and B
  • Neither A nor B
  • To determine

    The technician with correct approach.

    Explanation of Solution

    Given:

    Technician A says that a 12-volt light bulb that draws 12 amps has a power output of 1 watt.

    Technician B says that a motor that has 1 ohm of resistance has a power rating of 144 watts if it is connected to a 12-volt battery.

    According to Watts law, Power (P)=i×V

    According to Ohm’s law, i=vr

    Where, i = current

    v = voltage and

    r = resistance

    Now by putting value of’ i’ in above equation, we get,

    P=Vr×

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