It's correct, but we usually say "我觉得物理很有意思" or "我觉得学物理很有意思"("学" here is a verb) in Chinese.

if “物理学” is a noun，meas a subject ,then you are right, very good. if "学" is a verb,means learning 物理， we usually say "我觉得学物理很有意思" ：-）

This is correct.

“我写的对不对？” 谢谢

Yours: 您好 “我觉得物理学很有意思” 我写对不对？ Correction:您好, “我觉得物理学很有意思”， 我写的对不对？ 对的，正确。