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Why Strong Physics Preparation Is Now More Important Than Ever
Physics has become one of the strongest rank-deciding subjects in NEET because it rewards clarity, speed, and disciplined problem solving. Students who understand concepts deeply can handle fresh questions with confidence instead of depending only on memorised patterns.
A strong Physics foundation improves accuracy in mechanics, electricity, magnetism, optics, modern physics, and thermodynamics. It also builds the habit of reading data, choosing the right formula, and connecting theory with application. This is exactly the preparation style needed for a serious medical entrance journey.
Important Message for NEET 2027 and Future Aspirants
NEET 2027 aspirants should treat Physics as a long-term skill, not a last-minute burden. Begin with fundamentals, revise formulas regularly, solve mixed questions, and analyse every mistake with patience. Small daily improvements in Physics can create a powerful difference over one or two years.
Future aspirants should focus on conceptual confidence from the beginning. When you understand why a formula works and where it applies, numerical questions become far more manageable. Consistency, expert guidance, and regular testing can turn Physics from a fear into a scoring advantage.
Question Index
Not attempted: cream | Selected: gold | Correct: green | Wrong: red
A car travels half of its destination with speed of 40 km/h and another half with speed v. If the average speed of the car is 48 km/h then the value of v is
Answer (2)
For equal distances, vav = 2v1v2/(v1 + v2).
48 = (2 x 40 x v)/(40 + v), therefore v = 60 km/h.
Question 2Correct +4 | Wrong -1
In a case of a projectile projected from ground, the velocity is perpendicular to acceleration at
Answer (1)
At highest point, velocity v is horizontal while acceleration g is vertically downward. Hence v is perpendicular to g.
Question 3Correct +4 | Wrong -1
A satellite is orbiting very close to surface of the earth. Its time period is approximately
Answer (4)
T = 2πR/sqrt(GM/R) = 2πsqrt(R/g) = 84.6 minutes.
Question 4Correct +4 | Wrong -1
Which of the following is a unit vector?
Answer (2)
The magnitude of (î + ĵ)/sqrt(2) is sqrt(1/2 + 1/2) = 1.
Question 5Correct +4 | Wrong -1
If |A + B| = |A - B|, then the angle between vector A and B is
Answer (3)
A2 + B2 + 2AB cosθ = A2 + B2 - 2AB cosθ.
4AB cosθ = 0, so θ = 90°.
Question 6Correct +4 | Wrong -1
In uniform circular motion which of the following quantity is zero?
Answer (3)
In uniform circular motion, speed remains constant. Therefore the change in magnitude of velocity is zero.
Question 7Correct +4 | Wrong -1
Which of the following statement is correct for friction?
Answer (1)
Static friction is a self adjusting force of friction.
Question 8Correct +4 | Wrong -1
The change in surface energy when a drop of radius R splits into 8 droplets, each of radius r is (surface tension is T)
Answer (2)
(4/3)πR3 = 8 x (4/3)πr3, so r = R/2.
Ei = 4πR2T and Ef = 8 x 4π(R/2)2T = 8πR2T.
ΔE = Ef - Ei = 4πR2T.
Question 9Correct +4 | Wrong -1
Which of the following relation is correct? (Where symbols have their usual meanings)
Answer (2)
The correct torque relation is τ = r x F.
Question 10Correct +4 | Wrong -1
A body cooling from 70°C to 50°C in 1 minute. The time taken to cool same body from 50°C to 40°C is (Take surrounding temperature is 30°C)
Since K = 1/(4πε0), VA - VB = Q/(2πε0a)[1 - 1/sqrt(5)].
Question 15Correct +4 | Wrong -1
What is the work done by the electric field to take any charge q from point A to D?
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Answer (4)
VA = KQ/a - KQ/(3a) = 2KQ/(3a).
VB = -KQ/a + KQ/(3a) = -2KQ/(3a).
VA - VB = 4KQ/(3a).
WE = q(VA - VB) = (4/3)(Qq/(4πε0a)).
Question 16Correct +4 | Wrong -1
In an ideal thermodynamic system, gas is allowed to expand from volume V1 to V2. The work done by the system is maximum if it is
Answer (3)
Work done is the area under the P-V curve. For the same expansion from V1 to V2, the area is maximum in isobaric expansion.
Question 17Correct +4 | Wrong -1
Equation of a plane progressive harmonic wave is given as y = 0.02 sin(20t - x/25 + π/6). The speed of wave is (All quantities are in SI units)
Answer (3)
v = ω/K = 20/(1/25) = 500 m/s.
Question 18Correct +4 | Wrong -1
If two identical wires have resistivity ρ1 and ρ2. They are connected in series, then the equivalent resistivity is equal to
Answer (3)
R = ρ1l/A + ρ2l/A = ρ(2l/A).
Thus equivalent resistivity ρ = (ρ1 + ρ2)/2.
Question 19Correct +4 | Wrong -1
A wire of resistance 20 Ω is bent to form a square. What will be the equivalent resistance between diagonally opposite points?
Answer (2)
Each side of the square has resistance 5 Ω. Between diagonally opposite points, two branches of 10 Ω each are in parallel.
Equivalent resistance = 5 Ω.
Question 20Correct +4 | Wrong -1
A ball is moving with velocity 5 m/s towards a heavy wall moving towards the ball with speed 2 m/s. Assuming collision to be elastic, what will be the speed of ball immediately after the collision?
Answer (1)
Using the elastic collision result with a very heavy wall, v = ((m - M)/(m + M))5 + (2M/(m + M))(-2).
For M >> m, v = 9 m/s in magnitude.
Question 21Correct +4 | Wrong -1
A force F = -k/x2 î (x ≠ 0) acts on a particle moving in x-direction. The work done by this force in displacing a particle from x = +a to x = +2a (k = Positive constant) is equal to
Answer (1)
W = -k ∫a2a x-2 dx.
W = [-k/(-1)](1/(2a) - 1/a) = -k/(2a).
Question 22Correct +4 | Wrong -1
In a velocity selector, electric field vector and magnetic field vector must be oriented such that angle between them is
Answer (2)
For constant velocity, qE = q(v x B). Hence E is perpendicular to B.
Question 23Correct +4 | Wrong -1
What will be the moment of inertia of a uniform square plate of mass M and side a about an axis perpendicular to plane passing through its centre?
Answer (1)
I = Ix + Iy = ma2/12 + ma2/12 = ma2/6.
Question 24Correct +4 | Wrong -1
The principle of working of transformer is
Answer (2)
Working of transformer is based on mutual induction.
Question 25Correct +4 | Wrong -1
What is the pressure head in Bernoulli's theorem? (p = pressure, ρ = density, g = acceleration due to gravity)
Answer (3)
Pressure head = p/(ρg).
Question 26Correct +4 | Wrong -1
A biconvex lens has radii of curvature 10 cm each. If the refractive index of the material of lens is 1.5, then the focal length of lens is
Answer (2)
1/f = (μ - 1)(1/R1 - 1/R2) = (1.5 - 1)(2/R).
1/f = 0.5 x 2/10, so f = +10 cm.
Question 27Correct +4 | Wrong -1
Keeping all parameter fixed if distance between two slits in Young's double slit experiment is decreased, then fringe width will
Answer (1)
Fringe width = λD/d. If d decreases, fringe width increases.
Question 28Correct +4 | Wrong -1
Which of the following relations is a correct Einstein's photoelectric equation? [All symbols have their usual meaning]
In Bohr's atomic model, the time period of an electron in nth orbit depends on
Answer (1)
v ∝ Z/n and r ∝ n2/Z.
T = 2πr/v, hence T ∝ n3/Z2.
Question 30Correct +4 | Wrong -1
A magnet of length L and magnetic moment M is given. If it is bent in the shape as shown in figure, then the new magnetic moment will be
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Answer (4)
M = mL. If the magnet is bent into a semicircle, L = πR.
M' = m(2R) = m x 2(L/π) = (2/π)mL = 2M/π.
Question 31Correct +4 | Wrong -1
A PN junction diode is made up of a material which has energy gap of 3.0 eV. The maximum wavelength of radiation that can be absorbed by the material is nearly equal to
Answer (3)
λ = 12420/E(eV) Å = 12420/3 = 4140 Å.
Question 32Correct +4 | Wrong -1
An electron (rest mass = m0) is moving with speed v so that its mass becomes (5/3)m0, then the value of v is
Answer (4)
m = m0/sqrt(1 - v2/c2).
sqrt(1 - v2/c2) = 3/5, so v/c = 4/5 and v = (4/5)c.
Question 33Correct +4 | Wrong -1
When 23792U nucleus is converted into 20983Bi, x and y number of α and β- particles are emitted respectively then the value of x and y are respectively
Answer (3)
α = (237 - 209)/4 = 7.
β- = -92 + (83 + 14) = 5. Hence x = 7, y = 5.
Question 34Correct +4 | Wrong -1
The longest wavelength emitted in hydrogen atom belonging to Balmer series, is
Answer (4)
For the longest wavelength in Balmer series, transition is 3 to 2.
If a radiation of wavelength 200 nm is incident on a metal surface having work function 4 eV, then the value of stopping potential required is
Answer (2)
Eph = 12420/2000 eV = 6.210 eV.
KEmax = 6.21 - 4 = 2.21 eV, so Vsp = 2.21 volt.
Question 36Correct +4 | Wrong -1
Ratio of intensities of two waves from slits S1 and S2 is 4 : 1 respectively. Then the ratio of maximum to that of minimum intensities in YDSE is
Answer (2)
Imax = 4I + I + 2sqrt(4I2) = 9I.
Imin = 4I + I - 2sqrt(4I2) = I. Hence the ratio is 9 : 1.
Question 37Correct +4 | Wrong -1
If angle of minimum deviation by an equilateral prism is equal to its prism angle, then the refractive index of material of prism can be
Answer (2)
A = δm = 60°, so r = A/2 = 30° and i = (A + δm)/2 = 60°.
μ = sin60°/sin30° = sqrt(3) = 1.73.
Question 38Correct +4 | Wrong -1
An air bubble in a glass slab (μ = 1.5) appears 3 cm deep when viewed from one face and 4 cm when viewed from opposite face, then real thickness of glass slab is
Answer (4)
R1 = 1.5 x 3 = 4.5 cm and R2 = 1.5 x 4 = 6.0 cm.
R = R1 + R2 = 10.5 cm.
Question 39Correct +4 | Wrong -1
A transformer is used to illuminate a bulb rated as 100 W and 110 V, from a 220 V mains. If main current is 0.6 A, then the efficiency of transformer is nearly
Answer (2)
η = Pout/Pin = 100/(0.6 x 220) = 0.76.
Efficiency is nearly 76%.
Question 40Correct +4 | Wrong -1
40 W, 220 V and 110 W, 220 V bulbs are connected in series with 440 volt supply, then
The voltage across the 40 W bulb becomes greater than 220 V; therefore the 40 W bulb will fuse.
Question 41Correct +4 | Wrong -1
When plane of dip circle is in magnetic meridian it shows dip angle 30°, if plane of dip circle is turned by 30°, the new dip angle is
Answer (2)
tanφ' = tan30°/cos30° = (1/sqrt(3)) x (2/sqrt(3)) = 2/3.
φ' = tan-1(2/3).
Question 42Correct +4 | Wrong -1
The instantaneous angular position of a point on rotating wheel is given as θ = 4t3 - 12t2. The torque on the wheel is zero at
Answer (1)
ω = dθ/dt = 12t2 - 24t, and α = dω/dt = 24t - 24.
α = 0 at t = 1 s, so torque is zero at 1 s.
Question 43Correct +4 | Wrong -1
When a bob is suspended by light string and it is imparted a horizontal velocity to complete the full circular trajectory in vertical plane. What is the difference in tension between lowest and highest point of path?
Answer (2)
At the lowest point, TL = mg + mv12/l.
At the highest point, TH = mv22/l - mg.
The official result gives TL - TH = 6mg.
Question 44Correct +4 | Wrong -1
A monatomic gas at 300 K is compressed adiabatically to 1/8 th of its initial volume. The final temperature of the gas is
Answer (2)
For adiabatic process, T1V1γ-1 = T2V2γ-1.
T2 = 300(8)5/3 - 1 = 300(23)2/3 = 1200 K.
Therefore t2 = 927°C.
Question 45Correct +4 | Wrong -1
If the current flowing in a conductor varies with time as shown (in a semi-circular path), then find the net charge flown in 2 seconds
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