JEE Mains 2026 physics questions with solutions

Showing 1–10 of 246 questions

• MCQmediumAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  For the series LCR circuit connected with 220 V, 50 Hz a.c source as shown in the figure, the power factor is α/10. The value of α is______.

  The circuit has R = 60 Ω, X(L) = 70 Ω and X(C) = 150 Ω.

  

  Options

  • Option A

    4

  • Option B

    10

  • Option C

    6

  • Option D

    8

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  JEE Mains 202624 January Morning Shift

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• MCQeasyUnit dimension and errorsignificant number

  Keeping the significant figures in view, the sum of the physical quantities 52.01m, 153.2 m and 0.123 m is :

  Options

  • Option A

    205 m

  • Option B

    205.333 m

  • Option C

    205.33 m

  • Option D

    205.3 m

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  JEE Mains 202621 January Evening Shift

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• NumericeasyThermodyanmicsfirst law of thermodynamics

  A diatomic gas (γ = 1.4) does 100 J of work when it is expanded isobarically. Then the heat given to the gas __________ J.

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  JEE Mains 202621 January Evening Shift

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• MCQeasyUnit dimension and errorError and its addition ,subtraction,multipication and division

  In an experiment the values of two spring constants were measured as k₁ = (10 ± 0.2) N·m⁻¹ and k₂ = (20 ± 0.3) N·m⁻¹. If these springs are connected in parallel, then the percentage error in equivalent spring constant is :

  Options

  • Option A

    2.67%

  • Option B

    2.33%

  • Option C

    1.33%

  • Option D

    1.67%

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  JEE Mains 202621 January Morning Shift

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• MCQeasyThermodyanmicskinetic therory of gaseous

  The r.m.s speed of oxygen molecules at 47°C is equal to that of the hydrogen molecules kept at______°C. (Mass of oxygen molecule/mass of hydrogen molecule=32/2)

  Options

  • Option A

    -235

  • Option B

    -100

  • Option C

    -253

  • Option D

    -20

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  JEE Mains 202621 January Evening Shift

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• NumericeasyWave Opticsyoung's dubble slit experiments

  In two separate Young’s double-slit experimental set-ups, two monochromatic light sources of different wavelengths are used to get fringes of equal width. The ratios of the slit separations and that of the wavelengths of light used are 2 : 1 and 1 : 2 respectively. The corresponding ratio of the distances between the slits and the respective screens (D₁ / D₂) is ________.

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  JEE Mains 202623 January Morning Shift

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• MCQmediumGeometrical opticsspherical mirror

  Distance between an object and three times magnified real image is 40 cm. The focal length of the mirror used is _____ cm.

  Options

  • Option A

    -15/2

  • Option B

    -10

  • Option C

    -20

  • Option D

    -15

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  JEE Mains 202624 January Evening Shift

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• MCQeasyWave Motionsound wave and its general equation and velocity

  A point source is kept at the center of a spherically enclosed detector. If the volume of the detector increased by 8 times, the intensity will

  Options

  • Option A

    increase by 8 times

  • Option B

    increase by 64 times

  • Option C

    decrease by 8 times

  • Option D

    decrease by 4 times

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  JEE Mains 202624 January Evening Shift

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• MCQmediumWave Motionquestion based on string wave

  Two strings (A, B) having linear densities $\mu_{A}$ = 2 × 10⁻⁴ kg·m⁻¹ and $\mu_{B}$= 4 × 10⁻⁴ kg·m⁻¹ and lengths L₍ᴀ₎ = 2.5 m and L₍ʙ₎ = 1.5 m respectively are joined. Free ends of A and B are tied to two rigid supports C and D, respectively creating a tension of 500 N in the wire. Two identical pulses, sent from C and D ends, take time t₁ and t₂, respectively, to reach the joint. The ratio t₁ ─── t₂ is :

  Options

  • Option A

    1.08

  • Option B

    1.90

  • Option C

    1.67

  • Option D

    1.18

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  JEE Mains 202621 January Morning Shift

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• IntegermediumRotational Motionrotational constrain motion

  A fly wheel having mass 3 kg and radius 5 m is free to rotate about a horizontal axis. A string having negligible mass is wound around the wheel and the loose end of the string is connected to a 3 kg mass. The mass is kept at rest initially and released. Kinetic energy of the wheel when the mass descends by 3 m is ______ J.

  (g = 10 m/s²)

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  JEE Mains 202628 January Evening Shift

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