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8. Let at any time t, the level has fallen by a distance x (= Vt) Time constant (t) = RCeq Correct choice: (A)
9. n0 sin θ = n0/8 sin π/2 => θ = sin-1 (1/8) Correct choice: (B) 10. Correct choice: (B)
11. Correct choice: (B) 12. Correct choice: (B) 13. Correct choice: (C)
14. At r = R, E = kZe/R2 which is constant. Correct choice: (A) 15. Total charge q = ∫0R4π r2 (dr)(d - d/R * r)=(π dR3)/3 = Ze => d = 3Ze/(π R3 ) Correct choice: (B) 16. The electric field inside a spherical charge distribution is linearly dependent on distance from centre when charge density is uniform. Hence a = R. Correct choice: (C) 17. For linear motion f – 2kx = Ma For rotational motion, Solving, a = 4kx/3M Therefore the net external force, F = Ma = -4kx/3 Correct choice: (D) << Back | Next >>
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IIT-JEE-Physics-Paper 2 -2008-Solution 18. w =...