Hi,

Basically as per your question if you know the concepts then it will become very easy to solve more and more problems / questions.

To build your confidence and to develop your thought process you should solve the more and more questions for that here are the some youtube channels which you can refer to build your basics.

1) Exam Fear Education has 460 videos on class 12 physics

2) Etoos Education has 180 videos on physics for IIT preparation

3) Conceptual Physics India it has some best videos which offers preparation for your JEE exam

4) Physics plus this channel is best for NCERT Solutions

5) Physics Galaxy it is also known for NCERT solutions

These are the 5 platforms which are available for free preparation for 12th Physics on YouTube .

Similarly if you want to be very focused then you can be a part of paid platforms such as Physics Wallah, Unacademy and many more.

Hope you have got your answer.

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