PYQ Pattern Analysis — NEET Previous Year Question Patterns — Notes

NEET Pattern	Typical Question Form	Key Answer Strategy	Most Common Year	Trap
Soap bubble vs drop	"Excess pressure inside a soap bubble of radius R is _"	Count surfaces: bubble = 4S/R, drop = 2S/R	2016, 2018, 2021	Choosing 2S/R for bubble
Terminal velocity ratio	"Ratio of terminal velocities of spheres of radii r and 2r"	v_t ∝ $r^{2}$ , so ratio = 1:4	2017, 2019, 2022	Using linear r ratio (1:2)
Young's modulus extension	"Extension in wire of length L, area A, load F, Young's modulus Y"	$\Delta L$ = FL/(AY), check units m	2015, 2018, 2020	Forgetting to convert $mm^{2}$ to $m^{2}$
Stress-strain graph	"Identify elastic limit / yield point / Ultimate stress on graph"	Learn sequence: P → E → Y → U → B	2016, 2020	Confusing elastic limit with proportional limit
Capillary rise	"Rise in tube of radius r, angle θ, surface tension S"	h = 2S cosθ / (ρgr); check sign of cosθ	2014, 2019	Ignoring cosθ = 1 assumption
Bernoulli application	"Velocity at narrower section given wider section data"	Use continuity ( $A_{1}$ v_{1} = $A_{2}$ v_{2}) then Bernoulli	2017, 2021	Not applying continuity first
Thermal expansion	"Volume expansion coefficient in terms of linear coefficient"	β = 3α always	2015, 2018	Saying β = 2α (area expansion)