2023120 marks30 questions
24 of its 30 questions are here. The rest have a figure or are still being checked, so for now they're only in the official PDF.
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Source: JEE (Main) 2023, Paper 1 (B.E./B.Tech), 11 Apr 2023 Shift 2, Physics, published by NTA. The official PDF
A car P travelling at 20 ms⁻¹ sounds its horn at a frequency of 400 Hz. Another car Q is travelling behind the first car in the same direction with a velocity 40 ms⁻¹. The frequency heard by the passenger of the car Q is approximately [Take, velocity of sound = 360 ms⁻¹]
The root mean square speed of molecules of nitrogen gas at 27°C is approximately : (Given mass of a nitrogen molecule = 4.6 × 10⁻²⁶ kg and take Boltzmann constant k_B = 1.4 × 10⁻²³ JK⁻¹)
A space ship of mass 2 × 10⁴ kg is launched into a circular orbit close to the earth surface. The additional velocity to be imparted to the space ship in the orbit to overcome the gravitational pull will be (if g = 10 m/s² and radius of earth = 6400 km):
The Thermodynamic process, in which internal energy of the system remains constant is
A body of mass 500 g moves along x-axis such that it's velocity varies with displacement x according to the relation v = 10√x m/s the force acting on the body is:-
Eight equal drops of water are falling through air with a steady speed of 10 cm/s. If the drops coalesce, the new velocity is:-
When vector A⃗ = 2î + 3ĵ + 2k̂ is subtracted from vector B⃗, it gives a vector equal to 2ĵ. Then the magnitude of vector B⃗ will be :
A projectile is projected at 30° from horizontal with initial velocity 40 ms⁻¹. The velocity of the projectile at t = 2 s from the start will be : (Given g = 10 m/s²)