You are trying to determine if the AC adapter for a laptop computer is working correctly. The computer has been operating on battery power for a few hours. The power utility indicates that less than 25 percent of the battery charge remains.
Normally, the power light on the laptop glows green when the battery is fully charged and the laptop is using AC power. You plug in the AC adapter and connect it to the laptop computer.
How can you determine from the power light whether or not the battery is charging?
1. >>The power light steadily glows green.
2. The power light blinks in an alternate color (such as yellow or orange).
3. The power light steadily glows in an alternate color (such as yellow or orange).-->Correct
4. The power light blinks green.
Explanation : The power light will steadily glow in an alternate color, other than green, if the AC adapter is working properly and charging the battery. Typically, the power light glows yellow or orange when charging. Most operating systems also have a power management utility that you can run to determine whether or not the battery is charging.
The power light should not steadily glow green. This indicates that the laptop is operating on AC power and that the battery is fully charged. The battery has only 25 percent of its charge remaining, so it is not fully charged.
The power light should not blink. A blinking light typically indicates that the laptop has entered a power saving mode, such as standby or suspend. The color varies by manufacturer, but the light could blink green or an alternate color.
Objective: Laptops and Portable Devices
