1.

An insulated sphere of radius `R` has a uniform volume charge density `lambda`. The electric field at a point `A`, which is at distance `r` from its center is given by `(R gt r)`A. `(rho R)/(3 epsilon_(0))`B. `(rho r)/(epsilon_(0))`C. `(rho r)/(3 epsilon_(0))`D. `(3 rho r)/(epsilon_(0))`

Answer» Correct Answer - 3
`E = (1)/(4 pi in_(0)) (Qr)/(R^(3)) = (1)/( 4 pi in_(0)) . (rho . (4)/(3) pi R^(3) r)/(R^(3)) = (rho r)/(3 in_(0))`


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