Hi,

To answer you question, competitive exams like JEE and NEET are just for admission in Engineering and medicine courses only. For admission in class 11th and 12th JEE or any sort of competitive entrance exam is required . Also it is not possible for any Class 10th student to appear in NEET exam as eligibility  criteria clearly states that the candidate should have cleared class 12 or should be appearing for examinations this year.

I hope I was able to clear your doubts.

Hey,

No you don't have to appear for jee to get admission in class 11th of any school. In order to appear for jee/neet one has to complete her 11th and 12th regular classes like any other student. If you're willing to switch your board it's fine you can go for any cbse board school and have to not appear for any jee for that. Some schools might have their own entrance exams for admissions but that differs from school to school.

Hope this helps.