I'm currently studying (Undergraduate) Physics in a University where, regardless of their department, every student must take some English, Turkish and History courses, which I don't want to attend. Turkish and History courses are non-credit but not English, so it affects my GPA. Moreover, I will take violin, astrophysics and philosophy courses as non-included.
So here is my question: when I am applying for a PhD in Physics or Mathematics, does any of these courses have any effect on my admission?
Note: My main concern is whether having low grades in English ,which is not a non-credit course, affect my Phd admission ?
In general I am pretty sure attending those courses will definitely not have a bad effect on your admission. Attending courses with topics outside the subjects area shows that you don't have a much 'limited horizon' and they broaden your interdisciplinary skills. To gain expertise in philosophy and astrophysics is maybe leading to have an eye of a bigger picture when solving problems and playing the violin testifies character. Those courses will so be seen as a plus regarding your personal skills when applying.