Ask a candidate why they lost Physics marks and they will usually say the topic was hard. Check the paper and it is more often a sign error, a unit left in centimetres, or a correct method abandoned halfway because the clock felt loud.
Write what you are given before you think
Every numerical, without exception: list the given quantities with their units down the left, and the unknown at the bottom. Ten seconds.
It feels like a waste of time under pressure, which is exactly why it is worth enforcing as a habit. It catches the missing conversion before you have built three lines of algebra on top of it.
Convert to SI immediately
Not later, not "I will remember". Centimetres to metres, grams to kilograms, minutes to seconds — at the moment you write the quantity down.
A factor of 100 introduced at step one propagates through every subsequent line, and the answer that comes out often looks plausible. That is what makes it dangerous: a wrong answer that resembles an option is worth −1.
Check dimensions before you compute
If you are solving for a velocity, the expression you have built should have dimensions of length over time. Confirming that takes five seconds and catches a whole class of algebra errors before you have spent a minute on arithmetic.
It also catches the error you are least likely to spot by rereading: an expression that is almost right.
Decide the attempt inside 30 seconds
Read the question, identify what it wants, and make one of three decisions:
- I know the route — attempt now.
- I recognise the type but not the route — flag and return.
- Nothing — leave it, and stop thinking about it.
The expensive case is the fourth one nobody plans for: half-recognising a question and spending four minutes discovering you cannot do it. Those four minutes cost more than the question was worth.
Practise the arithmetic, not just the physics
NEET gives no calculator. If the algebra is right but you cannot divide quickly and accurately under pressure, the mark is lost identically.
Practising mental arithmetic feels beneath the difficulty of the exam. It is still where a meaningful number of marks go.
A worked habit
- List givens with units, convert to SI.
- Name the principle in one word — conservation, equilibrium, kinematics.
- Write the equation before substituting any number.
- Check dimensions.
- Substitute, compute, and look at whether the magnitude is sane.
Five steps, and steps two and four are the ones people skip under pressure. They are also the two that catch the most errors.