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Grade 6Mechanics

This question contains Statement-l and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.
Statement-1 :
For a mass M kept at the centre of a cube of side 'a' the flux of gravitational field passing through its sides 4 n GM and
Statement-2:
If the direction of a field due to a point source is radial and its dependence on the distance 'r' £tom the source is given as 1/ r2 , its flux through a closed surface depends only on the strength of the source enclosed by the surface and not on the size or shape of the surface.
(a) Statement -1 is false, Statement-2 is true
(b) Statement -1 is true, Statement-2 is true; Statement -2. Is a correct explanation for Statement- 1
(c) .Statement -1 is true, Statement-2 is true; Statement -2 is not a correct explanation for Statement- 1
(d) Statement -1 is true, Statement-2 is false

Profile image of Lokesh kumar
12 Years agoGrade 6
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1 Answer

Profile image of Deepak Patra
12 Years ago

(b) Gravitational flux through a closed surface is given by vEg S = - 4pGM

where, M = mass enclosed in the closed surface This relationship is valid when |Eg|? 1/r2­.