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 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.
| Toughest Shift of JEE Main January 2025 (Session 1) | Easiest Shift of JEE Main January 2025 (Session 1) |
JEE Main 29 January 2025 Physics Shift 2 Question Paper with Answer Key Solutions
| Q.No. | Questions | Answers |
|---|---|---|
| 1 | An equiconvex lens is cut into two ways as shown. If the focal length of the parts are as mentioned in the diagram. Find L 1 /L 2 | 1/2 |
| 2 | A 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 solenoid | 8πcm |
| 3 |
Three 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 |
| 4 | A (iv) B (i) C (iii) D (ii) | |
| 5 | Two particles of same mass are performing SHM vertically with two different springs of spring constants K 1 and K 2 . If amplitude of both is same. Find ratio of the maximum speed of two particles. | √K 1 /K 2 |
| 6 | A physical quality Q is given as Q = ab 4 /cd, if the percentage error is a,b,c and d are 2%, 1%, 2% and 1% the % error in Q will be | 9% |
| 7 |
Assertion: 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 |
| 8 | Two planet A and B are revolving around a massive start such that r A = 2r B and m A = 4√3 m B Find ratio of angular momentum of planet B to planet A . | 1/ 2√3 |
| 9 | A capacitor C 1 = 6μF, initially charged with a call of emf 5V is disconnected and connected to another capacitor C 2 = 6μF, which is initially neutral. The charges on C 1 and C 2 after connection are | 10μc, 20μc |
| 10 |
Three particles of same mass are moving as shown. (all collisions are elastic)
| S1 Incorrect, S2: Correct |
| 11 | An electromagnetic wave propagates in +X direction, then electric field and magnetic field are direct along | Y, Z |
| 12 | A converting lens of focal length 24cm, made of glass (μ glass) is immersed completely in water. (μ glass = 1.33). It will now behave like a converging lens of focal length ____ cm. | 96 |
| 13 |
The truth table for the logical circuit shown below is
| |
| 14 |
Figure shows two spherical surfaces of radius R having common centre. If the object is placed at O
3
Find the distance between the first images formed by both the surface.
| 4R/35 |
| 15 |
A dipole is placed such that its axis is perpendicular to the infinite charged sheet. Select the correct options
| b and c |
| 16 | A 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 time | 13/5 t |
| 17 | Find the number of spectral lines in H-atom when deexcitation from n=4 to ground state | 6 |
| 18 | For 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 v n/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. | Questions | Answers |
|---|---|---|
| 1 |
Assertion: 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 |
| 2 | The velocity of a particle moving on a straight line varies with time as v=At 2 Bt/C+ t 1 where A, B, and C are constants. Find the dimension of ABC. | L 2 T -3 |
| 3 | A 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 |
| 4 | The graph between wavelength (λ)of incident light and Kinetic Energy (K.E) of photoelectron in photoelectric effect is | |
| 5 |
Identify the logic gate represented by circuit shown below.
| OR Gate |
| 6 |
Statement I: Electromagnetic wave have both energy and momentum.
Statement II: Rest mass of photon is zero. | Statement I is correct Statement II is incorrect |
| 7 | Two 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 |
| 8 | A 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 |
| 9 | Which of two physical quantities have same dimensions? | Angular momentum and Planck's constant |
| 10 | If radius of first Bohr's orbit of H-atom is a 0 Then find the radius of 2nd Bohrs orbit of H-atom. | 4a 0 |
| 11 |
Two coils having self-inductance L
1
and L
2
are placed closely such that they have a mutual inductance M. If the carry currents i
1
and i
2
as shown in the figure thane the induced emf in coil 1 is
| |
| 12 | An 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 μ 0 I/4πR is | R/2 |
| 13 | When ball is kept under seat at depth 2.5km. Find percentage change in its volume. If bulk modulus of water is 2 x 10 9 Pa. | 1.25% |
| 14 | Heat 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 |
| 15 |
Assertion: 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 |
| 16 | If 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 |
| 17 | In 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) | n 2 + 4 n 2 |
| 19 | A (iii) B (ii) C (ii) D (i) | |
| 20 | In a hydraulic lift, the two sides have areas A 1 = 25 cm 2 and A 2 = 100 cm 2 . If a force of 100 N is applied normally on the area A 1 , then the force on the area A 2 is ____ N. | 400 N |
You may also find important |
| Parameter | Link |
| Safe Score | Expected Safe Score in JEE Mains January 2025 |
| Safe Percentile | Expected Safe Percentile in JEE Main 2025 Session 1 |
| Question Paper (All Days) | JEE Main Question Paper January 2025 Shift 1 and 2 |
| JEE Main Percentile to Marks | Expected Marks for JEE Main Percentile January 2025 |
| Cutoff Percentile | JEE Main Expected Cutoff Percentile January 2025 |
| Percentile Score | JEE Main Expected Percentile Score January 2025 |
| Cutoff Marks | Minimum Marks in JEE Mains to Qualify for JEE Advanced 2025 |
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:
| Shift | Physics Question Paper with Answers Links |
| Shift 1 | JEE Main 2025 Question Paper Physics 29 January Shift 1 PDF |
| Shift 2 | JEE Main 2025 Question Paper Physics 29 January Shift 2 PDF |
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:
| Parameter | Question Paper Link |
| Chemistry | JEE Main 2025 January 29 Shift 1, 2 Chemistry Question Paper with Answer Key Solutions |
| Mathematics | JEE Main 2025 January 29 Shift 1, 2 Mathematics Question Paper with Answer Key Solutions |
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 Institute | Shifts | Physics Question Paper with Answer Key PDFs |
| Resonance | Shift 1 | Resonance JEE Main Physics Question Paper and Answer Key 2025 January 29 Shift 1 |
| Shift 2 | Resonance JEE Main Physics Question Paper and Answer Key 2025 January 29 Shift 2 | |
| Aakash | Shift 1 | Aakash JEE Main Physics Question Paper and Answer Key 2025 January 29 Shift 1 |
| Shift 2 | PDF download link to be updated soon | |
| Vedantu | Shift 1 | PDF download link to be updated soon |
| Shift 2 | PDF download link to be updated soon |
Subject-wise JEE Mains Marks vs Percentile 2025 |
| Name of the Subject | Link |
| Physics | JEE Main Physics Expected Marks vs Percentile 2025 |
| Chemistry | JEE Main Chemistry Expected Marks vs Percentile 2025 |
| Mathematics | JEE Main Mathematics Expected Marks vs Percentile 2025 |
| Event | Link for Expected/ Official Dates |
| Response Sheet | JEE Main Response Sheet January 2025 Expected Release Date |
| Answer Key | JEE Main Answer Key January 2025 Expected Release Date |
| Result | JEE Main Result Date January 2025 |
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