Explanation

"I was confident on my success" is the grammatically correct usage.

Confidence is generally followed by in/on depending on context, but with "success," on is standard.

Explanation

Exclamation means حروف فجائیہ

Explanation

The given sentence “I have been invited to the party” is passive voice.

Its correct active voice form is “Someone has invited me to the party.”

Explanation

The sentence refers to an action continuing up to the present, so present perfect tense is correct.

Correct form: I have not seen her for a long time.

Explanation

"Some" is used with uncountable nouns like "coffee" when making polite offers or requests.

"Can you please give me some coffee?" is grammatically and contextually correct.

Explanation

After “It is essential that”, the verb should be in the subjunctive mood (base form).

Correct sentence: It is essential that nitrogen be present in the soil for plants to grow.

Explanation

The subject is singular (One of the primary causes), so cause → causes.

Correct sentence: One of the primary causes of the accidents in coal mines is the accumulation of gas.

Explanation

The unit of measurement for inductance is the henry (H).

It is the International System of Units (SI) unit.

The henry is named after Joseph Henry, the physicist who independently discovered inductance.

Explanation

• The electrons that have been knocked out of the outermost shell of an atom are free electrons, which are able to move freely and conduct electricity.

Explanation

A magnetometer is specifically designed to measure the strength and direction of a magnetic field.

Flux meter measures magnetic flux.

Galvanometer measures electric current.