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Syllabus

_{0}_{}Their velocities become v1' and v2' at time 2t_{0}while still moving in air. The value of mod (m1v1'+m2v2') -(m1v1+m2v2) is(A) 15 cm (B) 25cm (C) 45 cm (D) 55 cm

a)t

^{1/2}b)t^{3/4}c)t^{3/2}d)t^{2}^{ 9}watts of power?(Assume 50% efficiency of conversion and g = 10 m/s^{2})lis shown in figure. The magnetic field at the centre O is$\left(1\right)\frac{2{\mu}_{o}l}{\mathrm{\pi r}}\frac{\sqrt{{a}^{2}+{b}^{2}}}{ab}\otimes \left(2\right)\frac{2{\mu}_{o}l}{\mathrm{\pi r}}\frac{\sqrt{{a}^{2}+{b}^{2}}}{ab}\odot \phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\left(3\right)\frac{{\mu}_{o}l}{2\mathrm{\pi r}}.\frac{\sqrt{{a}^{2}+{b}^{2}}}{ab}\otimes \left(4\right)\frac{{\mu}_{o}l}{2\mathrm{\pi r}}.\frac{\sqrt{{a}^{2}+{b}^{2}}}{ab}\odot $

What is r?

^{2}where K is constant. The total energy of the particle isa) K/2r b) -K/2r c) -K/r d) K/r

(1) 1.5 m/s (2) 6 m/s

(3) 3 m/s (4) 12 m/s