Question

v11.1% complete This is a Single Choice Question; skip ahead to question content A B C D E Confirm The label on a ceiling lighting fixture warns you to use a lightbulb of 60 watts or less. The voltage to the lightbulb is 120 volts. An intern calculated how much amperage a bulb of the maximum allowed wattage will draw. You are checking her work, shown below. If there is an error, what is the first step that has an error, and why is it an error? Step 1 volts × amps = watts write down formula Step 2 120 × ? = 60 fill in what is known Step 3 It looks like 0.5 will work 120 × 0.5 = 60 check Step 4 amps = 0.5 Step 1, because the formula should be amps = watts ÷ volts. Step 2, because the question mark should be by itself on the right side of the equation. Step 3, because you can’t just guess at a solution. Step 4, because the answer in the previous step was 60. There is no error. Report Content Errors © 2019 by ACT, Inc. All rights reserved. Terms of UsePrivacy PolicyContact Support

Answer 1

There is no error

Explanation:

While it is not necessary to guess an answer, because the answer can be calculated using the properties of equality, guessing is a legitimate solution method actually taught in (some) schools these days.*

The equation is properly written, data properly filled in, and the solution properly verified. There is no error.

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* What doesn't seem to be taught in US schools are methods of refining an incorrect guess. These are actually well-developed, and are legitimate ways to get to a good answer.