Many Common Electronic Devices Never Fully Turn Off

question 15

Multiple Choice

Many common electronic devices never fully turn off. If not disconnected from the power supply, they continue to draw electricity even when switched off. This hidden use of energy is called ______ .

• A) operational energy
• B) minimal loads
• C) embodied energy
• D) phantom loads

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Definitions:

Mean

The arithmetic average of a set of numbers, calculated by dividing the sum of the values by the number of values.

Variance

A measure of how much values in a dataset differ from the mean, indicating the distribution's spread.

Standard Deviation

The measure of the dispersion of a set of values relative to its mean, indicating how spread out the values are.

Standard Normal Curve

A bell-shaped curve that is symmetric about the mean, representing the distribution of a standard normal variable with a mean of zero and a variance of one.