O carregador ainda está ligado na tomada da cozinha.

In Portuguese, it is very common to use the definite article with nouns, especially when talking about a specific thing already known in the situation.

So o carregador means the charger.

Here:

• o = the for a masculine singular noun
• carregador = charger

If you said just carregador, it would sound less natural in this sentence.

Carregador usually means charger, especially for a phone, laptop, or other device.

It comes from the verb carregar, which can mean to charge, to load, or to carry, depending on context. In this sentence, carregador is the device used to charge something.

Here, ainda means still.

So it shows that the situation continues:

• the charger was plugged in before
• and it remains that way now

Common uses of ainda include:

• still
• yet
• even

But in this sentence, still is the correct idea.

Está ligado uses the verb estar plus the adjective/past participle ligado.

This structure describes the current state of the charger:

• está = is
• ligado = on / connected / plugged in, depending on context

Why not the others?

• liga is a verb form meaning turns on / calls / switches on, not the state
• é ligado uses ser, which usually sounds wrong here because this is a temporary condition, not an essential characteristic

So está ligado is the natural way to say the charger is currently connected or on.

In this sentence, ligado most naturally means plugged in / connected.

That is because of na tomada:

• tomada = electrical outlet / socket

So the full phrase strongly suggests a physical connection to the outlet.

In other contexts, ligado can also mean:

• on: A televisão está ligada. = The TV is on.
• connected
• even attentive / aware in informal speech: Fica ligado! = Pay attention! / Stay sharp!

Because ligado agrees with carregador, and carregador is masculine.

In Portuguese, adjectives often change form to match the noun:

• masculine singular: ligado
• feminine singular: ligada

Examples:

• O carregador está ligado.
• A televisão está ligada.

So the ending -o matches the masculine noun carregador.

Na tomada means in the outlet / into the socket / plugged into the outlet, depending on the translation.

Grammatically:

• em = in / on / at
• a tomada = the outlet / socket
• em + a = na

So:

• na tomada = in the outlet or more naturally plugged into the outlet

This contraction is very common in Portuguese.

In Brazilian Portuguese, tomada usually means an electrical outlet, socket, or power point.

So:

• ligado na tomada = plugged into the wall outlet

This is the normal everyday word in Brazil for the place where you plug in electrical devices.

Da cozinha is a contraction:

• de = of / from
• a cozinha = the kitchen
• de + a = da

So:

• na tomada da cozinha = in the kitchen outlet or more literally in the outlet of the kitchen

Portuguese uses these contractions all the time:

• do = de + o
• da = de + a
• no = em + o
• na = em + a

You can say just na tomada if the specific outlet is clear from context.

But da cozinha adds more information:

• not just any outlet
• specifically the one in the kitchen

So the sentence becomes more precise.

Compare:

• O carregador ainda está ligado na tomada. = The charger is still plugged into the outlet.
• O carregador ainda está ligado na tomada da cozinha. = The charger is still plugged into the kitchen outlet.

Yes, Portuguese allows some flexibility in word order.

These are all possible, depending on emphasis:

• O carregador ainda está ligado na tomada da cozinha.
• Ainda está ligado na tomada da cozinha o carregador. — grammatical, but less natural in normal speech
• O carregador está ainda ligado na tomada da cozinha. — possible, but less common
• Ainda o carregador está ligado... — usually not the most natural choice

The original sentence is the most neutral and natural everyday order.

Sometimes yes, but ligado is more natural here.

Compare:

• está ligado na tomada = is plugged into the outlet
• está conectado = is connected

Conectado is understandable, but it can sound a bit more technical or less idiomatic in this exact situation. For a charger in a wall outlet, Brazilians would very naturally say ligado na tomada.

Yes. Está is the third person singular of estar in the present tense.

The subject is o carregador, which is singular, so:

• o carregador está

Portuguese uses estar for states or conditions that are seen as temporary or current. Being plugged in is a current state, so estar is the right verb.

That is why:

• O carregador está ligado. = The charger is plugged in / on.

Yes, this is a natural sentence in Brazilian Portuguese.

It sounds like something someone might say when noticing a charger was left plugged in:

• O carregador ainda está ligado na tomada da cozinha.

In casual speech, some people might shorten or rephrase it slightly, but the sentence itself is completely normal and idiomatic.