This isn’t a major problem. You are able to solve previous year questions, therefore you are already doing a good job.
As for practice, no one gets all the questions right. Your target should be around 70-80% rightly answered questions while you practice.
To tackle your problem:
- Find a trend
Most people tend to get questions of a particular trend wrong. For example:
A. questions asking relationship between two quantities, such as relation between acceleration and velocity for a given formula of displacement(x)……Or relationship between angular velocity and angular momentum, in terms of some other quantity, say velocity…. L=Iw (omega) , v=wr (w=omega)
B. Questions asking maximum and minimum values….
I hope you get the idea…
2. Since you are already solving the PYQs well, then i am assuming that you don’t make much numerical or calculation errors. But if you do, you should try to rule them out.
One mistake I used to make was try and do a lot of maths necessary for the question in my head…. It used to save me some time, but I used to get 2 or 3 questions per 10 solved in such a manner, wrong that way.
So, if you aren’t sure that you can calculate fast enough in your brain, rather than trying it out to save time, you should do it with pen.
3. If there’s a specific topic whose questions you are unable to solve, get back to the topic’s concepts, make sure you are crystal clear and sound with them. Then start by solving some basic questions involving relationships between physical quantities, DON’T GO TO BASIC NUMERICALS! That’s just for building a flow with the topic.
The quantity relationship questions will test you out as to how much have you fully grasped the topic. But don’t waste a lot of time in them!
4. You can refer good physics books like MTG Physics Guide, USS for practice
For conceptual matter, don’t switch at this point in time! Stick to what you have studied in your entire preparation.
5. Since there isn’t a lot of time left for NEET, Analyze the weightage of the topics that you are weak at….. Do the ones whose weightage is more first, for example – rotational motion, semiconductors, thermodynamics, etc.
Remember you can’t cover up everything, something will always be left out! Rather than focusing on the leftouts, be focused and confident of the topics you have mastered.
6. You should try and understand the concept behind the derivation of a formula. I am not asking you to by heart the entire derivation! This is NEET, not boards! But if you can answer, why a formula was necessary, what exactly can i find out by this formula, and if you can visualise the motion or nuclear reaction or any other physical process happening, then you can understand a question well, rather than ending up confused….
It is also helpful because some questions will ask you to relate quantities, from different chapters…. Like NLM, friction and SHM in case of spring motion.