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What is the main function of the coin-cell battery on a motherboard?

Answer and explanation

Correct answer: Maintain the clock and firmware settings when power is off

The governing concept is backup power for motherboard real-time clock and firmware configuration. The coin-cell battery supplies a very small current when the computer is switched off, allowing the system clock and selected BIOS or UEFI settings to persist. It does not provide the main power needed by the CPU, control monitor brightness or increase disk capacity. Therefore option B correctly states its principal function.

Related tags

Cmos-BatteryMotherboardFirmware-ClockBasic Components Of A Computer SystemIct (Information & Communication Technology) Skills IIct Information Communication Technology Skills IArtificial IntelligenceClass 9 Mcq

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