2026100 marks25 questions
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Source: JEE (Main) 2026, Paper 1 (B.E./B.Tech), 5 Apr 2026 Shift 2, Physics, published by NTA. The official PDF
In an experiment to determine the resistance of a given wire using Ohm’s law, the voltmeter and ammeter readings are noted as 10 V and 5 A, respectively. The least counts of voltmeter and ammeter are 500 mV and 200 mA, respectively. The estimated error in the resistance measurement is __________ Ω
A mass of 1 kg is kept on a inclined plane with 30° inclination with respect to horizontal plane and it is at rest initially. Then the whole assembly is moved up with constant velocity of 4 m/s. The work done by the frictional force in time 2 s is __________ J. (Take g = 10 m/s²)
A wheel initially at rest is subjected to a uniform angular acceleration about its axis. In the first 2 s it rotates through an angle θ₁ and in the next 2 s it rotates through an angle θ₂. The ratio θ₂/θ₁ is __________.
A body of mass m is taken from the surface of earth to a height equal to twice the radius of earth (Rₑ). The increase in potential energy will be __________. (g is acceleration due to gravity at the surface of earth)
Eight mercury drops, each of radius r, coalesce to form a bigger drop. The surface energy released in this process is __________. (S is the surface tension of mercury).
An ideal gas at pressure P and temperature T is expanding such that PT³ = constant. The coefficient of volume expansion of the gas is __________.
A metal rod of length L rotates about one end at origin with a uniform angular velocity ω. The magnetic field radially falls off as B(r) = B₀e⁻λr, λ being a positive constant. The emf induced (neglecting the centripetal force on electrons in the rod) is :
A particle of charge q and mass m is projected from origin with an initial velocity v⃗ = (v₀/√2 x̂ + v₀/√2 ŷ). There exists a uniform magnetic field B⃗ = B₀ ẑ and a space varying electric field E⃗ = E₀e⁻λx x̂ within the region 0 ≤ x ≤ L. After travelling a distance such that x-coordinate has changed from x = 0 to x = L, the change in the kinetic energy is __________.