Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
1st Edition
ISBN: 9780078945830
Author: Charles William McLaughlin, Marilyn Thompson, Dinah Zike
Publisher: Glencoe Mcgraw-Hill
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Chapter 6, Problem 54R
To determine

To calculate: the power of the calculator.

Expert Solution & Answer
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Answer to Problem 54R

The power of the calculator is 0.9 W_ .

Explanation of Solution

Given data:

Voltage difference across the calculator, V=9 V

Current, I=0.1 A

Formula used:

Electrical Power Equation:

  P=IV

Where P is the power of a device in watts, I is the current through the device in amperes, and V is the voltage difference across the device in volts.

Calculation:

As per the problem,

  V=9 VI=0.1 A

Substitute the values of current and voltage difference in the electrical power equation:

  P=IVP=(0.1 A)(9 V)P=0.9W

Conclusion:

The power of the calculator is 0.9 W_ .

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