JEE Mains 2026 8 April Evening Shift physics questions with solutions

Showing 1–10 of 25 questions

• MCQmediumThermodyanmicsfirst law of thermodynamics

  One mole of an ideal diatomic gas is kept in a cylinder fitted with a frictionless piston. The piston area is 4 cm². The gas is heated slowly so that its temperature rises by 1.2°C, during which the piston moves outward by 25 mm. Atmospheric pressure is 100 kPa and R = 8.3 J·mol⁻¹·K⁻¹. Neglect the piston mass. Which listed value is the most suitable heat supplied ?

  Options

  • Option A

    24.8 J

  • Option B

    25 J

  • Option C

    15.04 J

  • Option D

    29.98 J

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• MCQmediumRotational Motioncombined translatory and rotatory motion ,Pure rolling motion

  A solid cylinder of radius R slides on a rough horizontal surface. At t = 0, its has translational speed v₀ = 49 m·s⁻¹ perpendicular to its axis and its angular speed has magnitude v₀ ÷ (4R) about the centre. The coefficient of kinetic friction is μₖ = 0.25. Taking g = 9.8 m·s⁻², how long does it take for pure rolling to begin?

  Options

  • Option A

    15 s

  • Option B

    5 s

  • Option C

    10 s

  • Option D

    7.5 s

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• MCQmediumMagnetic effect of currentmabnetic moment and torque on current carring loop in magnetic field

  A circular current loop of radius 2 cm carries current 100√2 A. Its unit normal is n̂ = (î+k̂) ÷ √2. The loop is placed in the magnetic field B = B₀(3î+2k̂), where B₀ = 4×10⁻³ T. Taking π = 3.14, what torque vector acts on the loop?

  Options

  • Option A

    16×10⁻⁵ k̂ N·m

  • Option B

    5024×10⁻⁷ k̂ N·m

  • Option C

    5024×10⁻⁷ î N·m

  • Option D

    5024×10⁻⁷ ĵ N·m

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• NumericmediumCenter of maas , Momentum and Collisionmomentum and conservation of momentum

  Two particles of masses 3.4 kg and 2.5 kg have initial speeds 5 m·s⁻¹ and 12 m·s⁻¹, respectively, and move with constant accelerations. During the 5th second, they cover 104 m and 129 m, respectively. After 10 s, their momentum ratio p₁ ÷ p₂ is x ÷ 8. Find x.

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• IntegermediumCapacitorcapacitor with dielectric

  A parallel-plate capacitor has plate separation 0.885 mm. When an insulating material fills the gap, the capacitance is 1 μF. The material has resistivity 1×10¹³ Ω·m, and the measured resistance between the plates is 17.7×10¹⁴ Ω. If the relative permittivity is α×10⁷, find α. Take ε₀ = 8.85×10⁻¹² F·m⁻¹.

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• MCQmediumNuclear physicsradioactivity and law of decay

  Two radioactive nuclei A and B have mass numbers 200 and 212, respectively. Both undergo spontaneous α-decay with the same Q-value of 1 MeV. What is the ratio of the kinetic energies of the emitted α-particles, K(A) ÷ K(B)?

  Options

  • Option A

    2548 ÷ 2650

  • Option B

    2706 ÷ 2646

  • Option C

    2597 ÷ 2600

  • Option D

    2862 ÷ 2499

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• MCQmediumKinematics part-2 Projectile MotionGround to ground projectile

  Two identical projectiles are launched with the same speed at two different angles and have the same horizontal range R. Their times of flight are 5 s and 10 s. Taking g = 10 m·s⁻², what is R?

  Options

  • Option A

    250 m

  • Option B

    25 m

  • Option C

    500 m

  • Option D

    125 m

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• MCQeasySimple Harmonic Motiontime period of linear shm

  A mass m is suspended from a uniform spring and oscillates with frequency ν₁. The same spring is cut into two equal halves, and the same mass is suspended from one half. If the new frequency is ν₂, what is ν₂ /ν₁?

  Options

  • Option A

    1

  • Option B

    2

  • Option C

    √2

  • Option D

    √3

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• MCQmediumElectromagnetic Inductionself induction and L-R circuit

  A solenoid is 30 cm long, has 10 turns per centimetre and cross-sectional area 5 cm². Its current changes uniformly from 2 A to 4 A in 3.14 s. What is the magnitude of the self-induced emf if it is written as α×10⁻⁵ V?

  Options

  • Option A

    60×10⁻⁵ V

  • Option B

    12×10⁻⁵ V

  • Option C

    120×10⁻⁵ V

  • Option D

    34×10⁻⁵ V

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• MCQmediumCircular Motioncentripital force and centrifugal force

  A car travels at 54 km·h⁻¹ around a horizontal circular turn of radius 20 m. A simple pendulum is suspended from the ceiling of the car and reaches a steady inclination during the turn. Taking g = 10 m·s⁻², what angle θ does the string make with the vertical?

  Options

  • Option A

    tan⁻¹(0.5)

  • Option B

    tan⁻¹(0.75)

  • Option C

    tan⁻¹(1.125)

  • Option D

    tan⁻¹(0.25)

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