The part of the computer system shown in Figure 11 is used to

The part of the computer system shown in Figure 11 is used to power on or off the computer. The figure shows a power button symbol, which is typically used to turn on or off the computer. When you press the power button, the computer's power supply sends electricity to the motherboard, which then initializes the various components in the computer and starts up the operating system. Pressing and holding the power button for a few seconds can force the computer to shut down in case it's not responding or has frozen. Therefore, the power button is an essential component of any computer system, allowing users to turn it on and off as needed.