Original questions for every unit in all five NEET forms, each with a worked answer and the reason each wrong option is wrong.
Units
All twenty, mechanics to electronic devices
Forms
Standard, assertion-reason, statements, count, match
Feedback
Why the answer is right and each wrong option wrong
Try 4 questions
Question 1
A stone is projected from level ground at 24 m/s at 53° above the horizontal. Taking g = 10 m/s², sin 53° = 0.8, cos 53° = 0.6 and ignoring air resistance, after what time is its velocity perpendicular to its velocity of projection?
Question 2
Water (density 1000 kg/m³) flows steadily through a pipe. At point X the pressure is 2.0 × 10⁵ Pa and the speed is 2.0 m/s. Point Y is 5.0 m higher than X, and the pipe's cross-sectional area at Y is half that at X. Treating the water as an ideal fluid and taking g = 10 m/s², what is the pressure at Y?
Question 3
Given below are two statements: one is labelled Assertion A and the other is labelled Reason R.
Assertion A: Doubling the speed of a charged particle that moves at right angles to a uniform magnetic field leaves its time period of revolution unchanged.
Reason R: The magnetic force on a moving charge is always at right angles to its velocity, so it does no work on the charge.
In the light of the above statements, choose the correct answer.
Question 4
Total binding energy of four nuclei
Nucleus
Mass number A
Total binding energy (MeV)
⁴He
4
28.3
⁷Li
7
39.2
¹²C
12
92.2
¹⁶O
16
127.6
The table gives the total binding energies of four nuclei. List them in order of increasing stability, judged by binding energy per nucleon.