Which one of the following vowel symbols is used in word 'sit'?

International Phonetic Alphabet (IPA): An alphabet used to accurately represent the pronunciation of languages. IPA helps in improving language pronunciation and feeling more confident speaking in the language.

Key Points

The aim of the IPA is to provide a unique symbol for each distinctive sound in a language i.e. every sound, or phoneme, that serves to distinguish one word from another.

• The IPA is designed to represent only those qualities of speech that are part of oral languages like phones, phonemes, and intonations.
• Language like English has limited sound to decode the words so we lack good pronunciations, phonetic symbols help in decoding words and pronouncing it correctly. 

Hence, the word 'Sit' is phonetically transcribed as /sɪt/.

Additional Information

• Phoneme: It is the smallest unit of sound' that distinguishes one word from another. Since sounds cannot be written, we use letters to represent or stand for the sounds.
• Consonant sound: Consonants sounds produced with some restriction or closure in the vocal tract. There are 24 consonant sounds in most English accents. 
• Vowel sound: In vowel sounds, the airflow is unobstructed when the sound is made. For example, the vowel sounds are the music or movement of our language. There are 20 vowel sounds in English.