Mein Handy ist ausgeschaltet.

Because Handy is a neuter noun in German: das Handy.

The possessive mein changes depending on the gender, number, and case of the noun:

• mein Handy
• meine Tasche
• mein Auto
• meine Bücher

So here, mein is the correct form for a neuter noun in the nominative case.

No. In German, das Handy means mobile phone or cell phone.

This is a classic false friend for English speakers, because English handy means useful or convenient, but German Handy is a noun meaning phone.

Examples:

• Mein Handy ist neu. = My phone is new.
• Wo ist dein Handy? = Where is your phone?

Because ist ausgeschaltet describes a state: the phone is switched off.

• ausschalten = to switch off / turn off
• ausgeschaltet = switched off
• ist ausgeschaltet = is switched off

By contrast, schaltet aus is a present-tense verb form meaning switches off or is switching off, so it describes an action, not the resulting state.

Compare:

• Ich schalte mein Handy aus. = I am switching off my phone.
• Mein Handy ist ausgeschaltet. = My phone is switched off.

It is historically the past participle of ausschalten, but in this sentence it functions like an adjective describing the phone’s condition.

So ist ausgeschaltet is best understood as:

• is switched off
• is turned off

German often uses a form like sein + past participle to describe a state.

Similar examples:

• Die Tür ist geschlossen. = The door is closed.
• Das Fenster ist geöffnet. = The window is open.
• Der Computer ist ausgeschaltet. = The computer is switched off.

The infinitive is ausschalten, which means to switch off or to turn off.

Its main forms are:

• infinitive: ausschalten
• present: ich schalte aus
• past participle: ausgeschaltet

This is a separable verb:

• Ich schalte das Licht aus.
• Er schaltet den Fernseher aus.

But in the participle, the aus- is attached again:

• ausgeschaltet

Because ausschalten is a separable verb with the prefix aus-.

When many separable verbs form the past participle, German inserts -ge- between the prefix and the verb stem:

• aus
  • geschaltet = ausgeschaltet
• an
  • gemacht = angemacht
• auf
  • gemacht = aufgemacht

So the pattern is often:

prefix + ge + stem + t/en

For ausschalten, that gives ausgeschaltet.

Because German main clauses usually follow the V2 rule: the finite verb comes in the second position.

In this sentence:

• Mein Handy = position 1
• ist = position 2
• ausgeschaltet = the rest

So the normal order is: Mein Handy | ist | ausgeschaltet.

You can move elements around, but the finite verb still stays second:

• Heute ist mein Handy ausgeschaltet.
• Zum Glück ist mein Handy ausgeschaltet.

Yes. Mein Handy ist aus is very common and natural in everyday German.

Difference in feel:

• Mein Handy ist aus. = more casual, shorter
• Mein Handy ist ausgeschaltet. = a bit more explicit or formal, literally is switched off

Both are correct and common.

You may also hear:

• Mein Handy ist nicht an.
• Ich habe mein Handy ausgeschaltet. = I switched off my phone.

They are very different:

• ausgeschaltet = switched off, turned off
• kaputt = broken

So:

• Mein Handy ist ausgeschaltet. = My phone is off.
• Mein Handy ist kaputt. = My phone is broken.

A phone that is ausgeschaltet can be turned on again. A phone that is kaputt has a problem.

A rough English-friendly guide:

• Handy ≈ HAHN-dee
• ausgeschaltet ≈ OWS-guh-shahl-tet

A few notes:

• a u in aus sounds like ow in now
• sch sounds like sh
• the t at the end is clearly pronounced
• the y in Handy sounds like ee

The stress is usually:

• HAN-dy
• AUS-ge-schal-tet

Usually, no. In normal German, Mein Handy ist ausgeschaltet primarily describes the current state: My phone is switched off.

If you want to focus more on the action or event, German would often use something like:

• Mein Handy wurde ausgeschaltet. = My phone was switched off.
• Jemand hat mein Handy ausgeschaltet. = Someone switched off my phone.

So ist ausgeschaltet normally means the phone is in the state of being off, not that the action itself is being emphasized.

Yes. This pattern is very common:

[noun] + ist + past participle/adjective

Examples:

• Der Computer ist ausgeschaltet. = The computer is switched off.
• Das Licht ist ausgeschaltet. = The light is switched off.
• Die Tür ist geschlossen. = The door is closed.
• Das Fenster ist geöffnet. = The window is open.

It is a very useful structure for describing states in German.

It is neutral and completely natural in standard German.

• Handy itself is the normal everyday word for mobile phone
• ausgeschaltet is standard and correct
• the whole sentence works in both speech and writing

In everyday conversation, many speakers might simply say:

• Mein Handy ist aus.

But Mein Handy ist ausgeschaltet is still perfectly normal and not strange at all.