1.

A hollow cylinder has a charges q coulomb within it. If phiis the electric fluxin units of V-m associated with the curved surface B, the flux linked with the plane surface A in units of V-m will be

Answer»

`(q)/(2in _0) `
`(phi)/(3) `
` (q)/( in_0) -phi`
` (1)/(2) [( q)/(in _0) -phi ]`

Solution :TOTAL FLUX over entire cylinder `=(q)/(in_0) ` From symmetry `phi_A =phi_C and phi_B= phi `
` therefore ""phi_A+phi_B+phi_C=phi_A+phi +phi__A=phi_A=(q)/(in_0) RARR phi_A=(1)/(2)[(q)/(in_0)-phi]`


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