Kindly refer to the following link(s):
Reciting Surah Fatiha behind Imam
Reciting Fateha behind the imam in Loud as well as Silent Prayers and Rakahs
Is reciting fateha behind the imam mandatory in loud & silent rakahs?
When can we recite fatiha in congregation in loud rakah? With imam, before or after? (along side imam)
If I joined the Prayer while Imam is in Ruku, without reciting Fateha?
Joined Imam in ruku, is my rakah valid? What if I don't have time to recite fateha?
If i join Jamaah and imam went to Ruku
Should I remain silent in silent prayers (Dhuhr & Asr) and silent rakahs?
Imam goes into Ruku too fast, what to do? (silent rakat)
Imam went to ruku before I could finish fatiha in a silent prayer, What should I do
Is reciting Fateha Compulsory in Silent Rakahs & Prayers?