You should never ‘measure’ the number of hours you study. What matters more is that you should study with full concentration whenever you study. Or in other words you should know when NOT to study.
I will try to prepare a list which guides when not to study for JEE.
- Never study when you are feeling asleep. I personally hate studying at night, especially late night. You must ensure that you are taking a proper sleep of atleast 7–8 hours.
- Never study while you are watching TV. Earlier I had the habit of studying in front of TV. Believe me it is useless.
- Either you are capable of putting aside your hobbies or you are NOT. If it is a NO, then allot atleast some time in a week to your hobbies. Don’t study when you are thinking about your favourite sport/activity.
- Never kill your inner voice. Study only when your mind is ready to do so.
By the way I feel if not studying under above circumstances you are able to save 4 hours for self study (excluding the time you spent at coaching), you can crack JEE.
5–6 hours can get you a good rank and just in case you are the one who can spare 8–10 hours, you are certainly talking within top 50–100.
Also the time you need to study will vary depending upon your IQ.
A 6 hour study might do wonders for an above average student but might be just enough to clear JEE for an average student.
All the BEST.
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