Question

An automatic cat feeder does not have a power rating listed, but it has a label stating that it draws a maximum current of $250.0 \mathrm{mA} .$ The feeder uses three $1.50 \mathrm{V}$ batteries connected in series. What is the maximum power consumed?

Name: Problem 67, Chapter 18: Physics
Uploaded: 2021-04-03T20:19:26-08:00
Duration: 1 min 59 s
Channel: Ivan Kochetkov
Description: An automatic cat feeder does not have a power rating listed, but it has a label stating that it draws a maximum current of 250.0 mA . The feeder uses three 1.50 V batteries connected in series. What is the maximum power consumed?

   An automatic cat feeder does not have a power rating listed, but it has a label stating that it draws a maximum current of $250.0 \mathrm{mA} .$ The feeder uses three $1.50 \mathrm{V}$ batteries connected in series. What is the maximum power consumed?

Physics

Robert Coleman… 5th Edition

Chapter 18, Problem 67

Instant Answer

Solved by Expert Ivan Kochetkov

04/03/2021

Step 1

Since the batteries are connected in series, we simply add up the voltages of each battery. Each battery has a voltage of $1.50 \mathrm{V}$, so the total voltage is $3 \times 1.50 \mathrm{V} = 4.5 \mathrm{V}$. Show more…

Show all steps

Thanks for your feedback!

An automatic cat feeder does not have a power rating listed, but it has a label stating that it draws a maximum current of $250.0 \mathrm{mA} .$ The feeder uses three $1.50 \mathrm{V}$ batteries connected in series. What is the maximum power consumed?

Play audio

Feedback

Ivan Kochetkov and 59 other subject Physics 102 Electricity and Magnetism educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Electrical Power

Electrical power is the rate at which energy is consumed or converted in a circuit and is calculated as the product of voltage and current. Understanding this concept allows one to determine how much energy a device uses, which is essential for assessing device performance and efficiency.

Series Circuit Connection

In a series circuit, components such as batteries are connected end-to-end, so the total voltage provided to the circuit is the sum of the individual voltages. This concept is crucial when determining the overall voltage available to a device when multiple batteries are used.

Unit Conversion in Electrical Calculations

Unit conversion, such as converting milliamperes to amperes, is an essential step in electrical calculations to ensure consistency and accuracy. Correct unit conversion guarantees that formulas like the power formula (P = V × I) are applied properly, yielding correct results in standard units.

Please give Ace some feedback