JEE Main 2025 January 28 Physics Question Paper with Answer Key Solutions (Available)

Download here the memory-based JEE Main 28 January 2025 Physics question paper with answer key solutions for both Shift 1 and Shift 2. Physics question paper PDF by top coaching institutes will also be available here.

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JEE Main 2025 January 28 Physics Question Paper with Answer Key Solutions (Available)

JEE Main 28 January 2025 Physics Question Paper: Following each shift, the JEE Main Physics question paper with answer keys for January 28, 2025, will be available on the page below. The answer key and question paper are exclusively for the Physics course and are not official in nature. Additionally, additional coaching organizations such as Resonance, Vedantu, and Aakash BYJU's will also provide the answer keys on the page below in a PDF format for convenient download. Since there are 25 questions in the Physics section of the test, all 25 questions and their unapproved responses will be posted on the page as soon as we get the candidates' question papers.

JEE Main 2025 January 28 Physics Shift 1 Question Paper with Answer Key Solutions

Here is JEE Main 28 January 2025 Physics question paper with answer key solutions for Shift 1.

Q.No.QuestionsAnswers
1Find equivalent resistance across A to B.
R/9
2A uniform wire of linear charge density λ is placed along the y-axis. The locus of equipotential surface isx2 + z2 = Constant
3Which of following reaction is correct? (Where symbols have their usual meanings)n→p+e-+v-
4The graph of root mean square velocity versus temperature is
5A coin is placed at the bottom of a hemispherical container filled with a liquid of refractive index μ.
Find the least refractive index if the coin is visible to an observer at E.
√2
6In the given figure, the square and the triangle have same resistance per unit length. Find the ratio of their resistances about adjacent corners.
27/32
7Assertion: Work done by the central force is independent of path.
Reason: Potential energy is associated with every force.
Both Assertion and Reason are incorrect.
8There is a smooth ring of radius R in vertical plane. A spring of natural length R and elastic constant K is vertical across along a diameter. The free end is connected to bead of mass m and when slightly disturbed it reaches point C with speed where V is
9The equivalent logic gate for the circuit shown below is
10Surface mass density varies as σ = σ0x/ab for the given plane sheet. Find the position of centre of mass for the distribution given
2a/3, b/2
11ζ1, ζ2 and ζ3 are the efficiencies of the three Carnot engines E1, E2 and E3 operating between temperatures shown in the figure. Choose the correct option relating to the efficiencies.
ζ2 + ζ3 > ζ1
12A simple pendulum of length l and both of mass m is placed on smooth horizontal surface as shown. When electric field of strength E is switched on, the bob passes the x-axis with speed v then
v = √qEl/m
13Statement 1: Velocity of sound in solids is more compared to that in gases.
Statement 2: Bulk modules of gas are more than that of solids.
Statement 1 is correct Statement 2 is incorrect.
14The dimensions of Young's modules of elasticity per unit length is MaLbTc then |a + b + c| is3
15To capacitor C1 and C2 are connected across same battery and store energies U1 and U2 respectively at steady state. Choose the correct option by observing the graph of charge vs time shown below.
C1<C2, U1<U2
16Energy of photon of wavelength λ is E0 which is equal to kinetic energy of proton of mass mp. The ratio of de Broglie wavelengths of proton and photon is1/c√E0/2mp
17In a YDSE, the distance of the 10th bright fringe from the central maxima is 10 mm when light of wavelength used is 600 nm. Find the distance (in mm) of the 10th bright fringe from the central maxima if light of wavelength 660 nm is used instead.11 mm
18The energy associated with a cylindrical region due to an EM wave E = 100sin(kx - ωt) is u0. Find the equation of EM wave for which a cylinder of same length and half the diameter (as previous one) contains same energy U0.200sin(kx-ωt)
19The lengths of a rectangular sheet are measured from a screw gauge of pitch 0.75 mm and number of division on circular scale = 15. Find maximum possible error in measurement of area.0.375 mm2
20There are two prisms of refractive indices of 1.54 and 1.72 respectively. If ray is not deviating after passing through two prisms, then find prism angle of second prism if prism angle of first prism is 4°.

JEE Main 2025 January 28 Physics Shift 2 Question Paper with Answer Key Solutions

Here is JEE Main 28 January 2025 Physics question paper with answer key solutions for Shift 2: 

Q.No.QuestionsAnswers
1In the given circuit, find l if the potentials at A and B are equals
2 A
2No of Paramagnetic species among the following is: 
O2,O2+O2-NO2,NO,CO
5
3How many of the following molecules are polar?
CH4,CCI4,CH2CL2,H2O,NH3,H2O2,O2F2
5
4In an electromagnetic wave, the magnetic field is given as B = (√3/2)i + (1/2)j) 30sin(ωt - kz), the corresponding electric field is(1/2i-√3/2j) 9 x 109sin (ωt - kz)
5The magnetic field B at the centre O of the given arrangement isol/8πa(3π+2)k
6A balloon system having mass m is moving up with acceleration a, find the mass to be removed from it to have acceleration 3a. (Neglect the volume of mass attached)ma/3a+g
7Mass M and radius R of a planet is related with Mass Me and Radius Re of earth as Me= 8Mp and Re= 2Rp. If escape speed for each is 11.2 km/sec, then escape speed of the planet is 5.6 km/sec
8An equilateral triangle frame of side l is carrying current i, find magnetic field at its centrroidoi/2πl
9The velocity vs time graph of a particle moving along X-axis is plotted as shown. The distance travelled (in metre) by the particle in the interval t= 0 s to t=4 s is
30 m
10Choose the correct option representing the energy density between the plates of a parallel plate capacitor with plate area A, plate separation d and potential difference V.oV2/zd2
11The correct variation of voltage across AB is given by (consider that the threshold voltage of the diode is very small)
12An electric dipole of moment 6 x 10-6 cm is placed parallelly in electric field of strength 106 N/C. Work done required to rotate the dipole by 180° is X joules, then X is12
13Distance between real object and its three times magnified image formed by concave mirror is 20 cm the radius of curvature of the mirror is X cm, then X is15
14Select the correct match for dimensions
Column-I                             Column-II
A) Angular Momentum         I) [MLT-2]
B) Force                               II)[ML2T-1]
C) Engery                            III)[ML-1T-2]
D) Pressure                         IV)[ML2T-2]
A-II, B-I, C-IV, D-III
15In the figure shown the object kept at a distance 13 cm from the interface forms a real image which is double in size. The radius of curvature of the interface is
2/3 cm
16Due to the bar magnet shown, if the % uncertainty in d is 1%, find uncertainty in the magnetic field at P. [d:10 units, l=10 units] 1.5%
17A capacitor of capacitance 1 μF is charged to potential of 20 V. Distance between plates is 10μm , then the charge density on plate is17.7μC/m2
18A ring of radius 3 cm has a soap film which is getting evaporated. Light of wavelength λ=580 nm gives minimum transmission every 12 s. Find the rate of evaporation. (Refractive index=1.45) 15π x10 -13 m3/s
19The figure shows a conducting rod sliding on two conducting rails having angle (θ = 60°) in a uniform magnetic field with a constant velocity V. Find n if the motional emf E various with time as E = ctn
1

Also Read| Expected Important Topics for JEE Main 29 January 2025

JEE Main 28 January 2025 Physics Question Paper PDF Download

Download here JEE Main 28 Jan 2025 Physics question paper and answer key by CollegeDekho as provided above in PDF format:

JEE Main 28 January 2025 Question Paper: Chemistry and Mathematics

For other subjects across both shifts, check and download JEE Main 28 January 2025 question paper here:

JEE Main 28 January 2025 Physics Question Paper PDFs by Coaching Institutions

For both Shift 1 and Shift 2, JEE Main 28 January 2025 Physics answer key and question paper PDF links have been provided as released by Resonance, Aakash BYJU's, and Vedantu in the below table:

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