Question

Laptop computers are made with batteries, but they must also be plugged into outlets to charge the batteries. Which is true regarding laptops?

1.They run only on alternating current.
2.They run only on direct current.
3.They can run on either direct or alternating current.
4.They do not run on direct or alternating current.

Answer 1

Answer:

3. They can run on either direct or alternating current.

General Formulas and Concepts:

Computers and Technology

• Power Bricks
• Electricity Conversion

Physics

Electricity

• Currents - AC is alternating current, DC is direct current

Explanation:

Manufacturers built laptops and their battery components on DC currents, meaning it is a one-way electricity path.

We also know that our wall outlets and electricity from the power lines and energy companies are AC, meaning they switch paths and alternate in their current.

• AC Electricity specifics: AC is usually easier to transport over long distances and is cheaper to generate

Since we need to plug in our laptops in order to charge them, we use a power brick. Power bricks convert the AC current flowing into the charger into DC current and sends it to your laptop battery.

Misconception:

Laptops only run on DC current. We can say, however, that laptops can run on both DC and AC currents, but remember that the power brick/charger is the component that is converting the currents.

Answer 2

Answer:

The answer is C 'They can run on either direct or alternating current.'

Explanation:

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