Predict your Rank

JEE Main 2025 January 29 Shift 1 Physics Question Paper with Answer Key Solutions (Available)

Download here the memory-based JEE Main 2025 January 29 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.

JEE Main 2025 January 29 Shift 1 Physics Question Paper with Answer Key Solutions (Available)

JEE Main 2025 January 29 Physics Question Paper: Exam takers can find the question paper for Session 1 online Day 5 examination along with answer key solutions of JEE Main 29 January 2025 Physics exam here. To examine the performance in Physics subject for Day 5 examination across both shifts, our exam experts will provide answers to all 25 questions on this page. Additionally, candidates can check the question paper PDFs of Phyiscs released by the top coaching institutes for expert answers.

JEE Main 29 January 2025 Physics Shift 2 Question Paper with Answer Key Solutions

Q.No.QuestionsAnswers
1An equiconvex lens is cut into two ways as shown. If the focal length of the parts are as mentioned in the diagram. Find L1/L21/2
2A solenoid of radius 10 cm carrying current 0.29 A and having total 200 turns. If magnetic field inside solenoid is 2.9 x 10-9 Find length of solenoid8πcm
3Three identical particles, each of mass m move under the influence of mutual attraction forces. Initially they are on the vertices of an equipotential triangle of side 'a' and have equal speed v direct towards the adjacent particles as shown. The net angular momentum about the centre just before collision is 
√3/2 mva
4A (iv) B (i) C (iii) D (ii)
5Two particles of same mass are performing SHM vertically with two different springs of spring constants K1 and K2. If amplitude of both is same. Find ratio of the maximum speed of two particles.√K1/K2
6A physical quality Q is given as Q = ab4/cd, if the percentage error is a,b,c and d are 2%, 1%, 2% and 1% the % error in Q will be9%
7Assertion: On increasing the pressure, the volume decrease is more in an isothermal process than in an adiabatic process.
Reason: Adiabatic process is given by PV-1
Assertion is correct and Reason is correct
8Two planet A and B are revolving around a massive start such that rA = 2rB and mA = 4√3 mB Find ratio of angular momentum of planet B to planet A.1/ 2√3
9A capacitor  C1= 6μF, initially charged with a call of emf 5V is disconnected and connected to another capacitor C2= 6μF, which is initially neutral. The charges on C1 and C2 after connection are 10μc, 20μc
10Three particles of same mass are moving as shown. (all collisions are elastic)
S1 Incorrect, S2: Correct
11An electromagnetic wave propagates in +X direction, then electric field and magnetic field are direct alongY, Z
12A converting lens of focal length 24cm, made of glass (μglass) is immersed completely in water. (μglass = 1.33). It will now behave like a converging lens of focal length ____ cm.96
13The truth table for the logical circuit shown below is 
14Figure shows two spherical surfaces of radius R having common centre. If the object is placed at O3 Find the distance between the first images formed by both the surface.
4R/35
15A dipole is placed such that its axis is perpendicular to the infinite charged sheet. Select the correct options
b and c
16A cup of coffee take a time 't' to cool from 90 degree Celcius to 80 degree Celcius in a surrounding of 20 degree Celcius.If a similar cup of coffee is cooled from 80 degree Celcius to 60 degree in a same surrounding, it takes a time13/5 t
17Find the number of spectral lines in H-atom when deexcitation from n=4 to ground state6
18For a certain mechanical system the rate of accretion dm/dt is proportional to √v, where m is mass, t is time v is velocity, then the power is proportional to vn/2 where n is ______.5

JEE Main 29 January 2025 Physics Shift 1 Question Paper with Answer Key Solutions

Here is JEE Main 29 January 2025 Physics question paper with answer key solutions for Shift 1: 

Q.No.QuestionsAnswers
1Assertion: At the peak of mountain, time period of pendulum increases
Reason: Time period of pendulum increases with decrease in g
Assertion is correct, Reason is correct
2The velocity of a particle moving on a straight line varies with time as v=At2 Bt/C+ t1 where A, B, and C are constants. Find the dimension of ABC. L2 T-3
3A pendulum of mass m/2 is released from a given situation. Find the speed of another pendulum after the collision. (e=1)2/3 √gl
4The graph between wavelength (λ)of incident light and Kinetic Energy (K.E) of photoelectron in photoelectric effect is 
5Identify the logic gate represented by circuit shown below.
OR Gate
6Statement I: Electromagnetic wave have both energy and momentum.
Statement II: Rest mass of photon is zero.
Statement I is correct Statement II is incorrect
7Two projectiles were launched from the same position simultaneously only same speed on of the projectile was launched at angle (45 - α) degree and other at an angle of (45 + α) degree. Find the ratio of maximum height of the projectile.1 - sin 2α 1 + sin 2α
8A river is flowing with speed 9km/hr. Boat is going downstream-speed of boat in still water is 27km/hr. A person in boat throws a ball upwards with speed 10 m/s. Find range of the ball as seen by an observer at bank of river.20 m
9Which of two physical quantities have same dimensions?Angular momentum and Planck's constant
10If radius of first Bohr's orbit of H-atom is a0 Then find the radius of 2nd Bohrs orbit of H-atom.4a0
11Two coils having self-inductance L1 and L2 are placed closely such that they have a mutual inductance M. If the carry currents i1 and i2 as shown in the figure thane the induced emf in coil 1 is
12An infinite solid cylinder wire of radius R carries a current I uniformly distributed along its area. The distance from the centre where the magnetic field is equal to μ0I/4πR is R/2
13When ball is kept under seat at depth 2.5km. Find percentage change in its volume. If bulk modulus of water is 2 x 109 Pa.1.25%
14Heat given to 0.5 moles of a monoatomic gas at constant pressure is 500J. Initial temperature of gas was 27 Degree Celsius. find value of ΔV and ΔT.300J, 48 degree Celcius
15Assertion: A negative potential is required to stop the photoelectron.
Reason: Speed of electron decreases when a negative potential is applied in a photo cell.
Assertion is correct Reason is also correct
16If electric dipole of dipole moment P is placed in electric field E with P||E . It is rotated slightly (and slowly) and released. Find the time period of oscillation of dipole (moment of inertia of dipole is).T= 2π √1/PE
17In adiabatic process of closed system, work done by the gas depends explicitly on Change in temperature 
18    A particle is able to complete the vertical circular motion with speed n √gR at top most point. Find the ratio of KE(Bottom)/ KE(Top)n2 + 4     n2
19A (iii) B (ii) C (ii) D (i)
20In a hydraulic lift, the two sides have areas A1= 25 cm2 and A2= 100 cm2. If a force of 100 N is applied normally on the area A1, then the force on the area A2 is  ____ N.400 N

    You may also find important |

    JEE Main 29 January 2025 Physics Question Paper PDF Download

    Download here JEE Main 29 Jan 2025 Physics question paper and answer key by CollegeDekho as provided above in PDF format:

    JEE Main 29 January 2025 Question Paper: Chemistry and Mathematics

    For other subjects across both shifts, check and download JEE Main 29 January 2025 question paper here:

    JEE Main 29 January 2025 Physics Question Paper PDFs by Coaching Institutions

    For both Shift 1 and Shift 2, JEE Main 29 January 2025 Physics answer key and question paper PDF links have been provided as released by Resonance, Aakash, and Vedantu in the below table:

    Coaching InstituteShiftsPhysics Question Paper with Answer Key PDFs
    Resonance Shift 1Resonance JEE Main Physics Question Paper and Answer Key 2025 January 29 Shift 1
    Shift 2Resonance JEE Main Physics Question Paper and Answer Key 2025 January 29 Shift 2
    AakashShift 1Aakash JEE Main Physics Question Paper and Answer Key 2025 January 29 Shift 1
    Shift 2PDF download link to be updated soon
    VedantuShift 1PDF download link to be updated soon
    Shift 2PDF download link to be updated soon

    Subject-wise JEE Mains Marks vs Percentile 2025 |

    Upcoming Important Dates of JEE Mains 2025 Session 1

    Keep visiting CollegeDekho for the latest Education News on entrance exams, board exams and admissions. You can also write to us at our email ID news@collegedekho.com.

    Get Help From Our Expert Counsellors

    JEE Main Previous Year Question Paper

    2024 Physics Paper Morning Shift

    Be the First to Know

    Get Access to Latest Updates

    Do you have a question? Ask us.

    • Typical response between 24-48 hours

    • Get personalized response

    • Free of Cost

    • Access to community

    Recent News