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JEE MAIN 2025(29jan shift2)Two planets, A and B are orbiting a common star in circular orbits of rad
March 5, 2025
Description Two planets, A and B are orbiting a common star in circular orbits of radii RA and RB, respectively, with RB = 2RA. The planet B is 4 2 times more massive than planet A. The ratio Lb/La angular momentum (LB) of planet B to that of planet A(LA) is closest to integer __________.

JEE MAIN 2025(29jan shift2): A sand dropper drops sand of mass m(t) on a conveyer belt at a rat
March 5, 2025
Description A sand dropper drops sand of mass m(t) on a conveyer belt at a rate proportional to the square rootofspeed(v)ofthebelt,i.e. dm/dt is proportional to rootv.IfPis the power delivered to run the belt at constant speed then which of the following relationship is true ? Welcome to Allen.AskDoubtnut.com – India’s Largest Platform for Instant Doubt

JEE MAIN 2025(29jan shift2)A convex lens mode of glass (refractive index = 1.5) has focal length 24
March 5, 2025
Description A convex lens mode of glass (refractive index = 1.5) has focal length 24 cm in air. When it is totally immersed in water (refractive index = 1.33), its focal length changes to (1) 72 cm. 2)96cm. 3) 24 cm. 4) 48 cm Welcome to Allen.AskDoubtnut.com – India’s Largest Platform for Instant Doubt Solutions

JEE MAIN 2025(29jan shift2)Given below are two statements.Assertion (A) :Three identical spheres of
March 5, 2025
Description Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) :Three identical spheres of same mass undergo one dimensional motion as shown in figure with initial velocitiesvA =5m/s,vB =2m/s,vC =4m/sIfwe wait sufficiently long for elastic collision to happen, then vA = 4 m/s,

JEE MAIN 2025(29jan shift2)Two concave refracting surfaces of equal radii of curvature and refracti
March 5, 2025
Description Two concave refracting surfaces of equal radii of curvature and refractive index 1.5 face each other in air as shown in figure. A point object O is placed midway, between P and B. The separation between the images of O, formed by each refracting surface is : 1) 0.214R. 2) 0.114R 3) 0.411R 4)

JEE MAIN 2025(29jan shift2)A plane electromagnetic wave propagates along the + x direction in free s
March 5, 2025
Description A plane electromagnetic wave propagates along the + x direction in free space. The components of the electric field E and magnetic field B associated with the wave in Cartesian frame are : (1) Ey, Bx. 2)Ey,Bz. 3)Ex,By 4) Ez, By Welcome to Allen.AskDoubtnut.com – India’s Largest Platform for Instant Doubt Solutions Allen.AskDoubtnut.com is
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