Question 1
A 2 kg trolley moving at 6 m/s on a smooth track collides with a 1 kg trolley at rest, and the two couple together. How much kinetic energy is lost in the collision?
NEET negative marking: when to answer and when to leave it blank
A correct answer earns 4 marks and an incorrect one loses 1, so a guess between two options you could not split earns 1.5 marks on average, and even a guess among all four earns 0.25. Leave a question blank only when you have a better use for the time.
| Correct | +4 |
|---|---|
| Incorrect | Minus 1 |
| Blank | 0 |
| Our papers | Two 45-question Physics papers, marked this way |
The arithmetic of a guess
- Two options left: half the time +4, half the time minus 1, an average of 1.5 marks.
- Three options left: one time in three +4, two in three minus 1, an average of about 0.67 marks.
- All four options left: one in four +4, three in four minus 1, an average of 0.25 marks, with a wide spread.
Where marks are really lost
Most lost marks are not blind guesses but confident wrong answers: an assertion-reason question where the reason was true but did not explain, or a statement misread. Our practice papers show each wrong answer with the reason it was wrong, so you can see which of these costs you most.
Try 2 questions
Question 2
| Frequency (× 10¹⁴ Hz) | Stopping potential (V) |
|---|---|
| 8 | 1.2 |
| 10 | 2.0 |
| 12 | 2.8 |
The table gives the stopping potential measured for light of three frequencies falling on the same metal. Using the data, what is the work function of the metal?
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Questions people ask
Does a blank answer lose marks in NEET?
No. An unanswered question scores 0. Only a marked incorrect option loses 1 mark.