Indian Institute of Science

Yes. In which year have you passed class 12th?

There is no other way. Application form is applicable only in online mode.

Yes, through JAM.

Placement is good but many students who study in IISc are not going for placement.

You have to pass 10+2 or PUC examination in 2017 with Physics, Chemistry & Mathematics as the main subjects from a recognised board. If you have studied Biology, Electronics, Computer Science, Statistics, etc. in addition to PCM, then also you are eligible to apply.
You have to secure a first class or 60% or an equivalent grade in a qualifying examination.
If you're SC/ST, then you have to score only passing marks in the examination.
You have to qualify one of the national level entrance tests: JEE Mains 2018, NEET 2018, JEE Advanced 2018 & KVPY-SA 2016, KVPY-SX 2017, KVPY-SB 2017.

Yes, Indian Institute of Science offers management seats for B.Sc. Physics. For admission through management quota, you have to visit the college and get the admission. Best of luck for your future and if any query, feel free to ask.

Yes, there is course of Bachelor of Science in Indian institute of Science. You can apply to get admission there. You will get admission there.
Good luck.