PhysicsHard46×since 2002Q6921Charge is distributed within a sphere of radius R with a volume charge density ρ(r)=Ar2e−2rs,\rho \left( r \right) = {A \over {{r^2}}}{e^{ - {{2r} \over s}}},ρ(r)=r2Ae−s2r, where A and a are constants. If Q is the total charge of this charge distribution, the radius R is :Aa log (1−Q2πaA)\left( {1 - {Q \over {2\pi aA}}} \right)(1−2πaAQ)Ba2{a \over 2}2a log (11−Q2πaA)\left( {{1 \over {1 - {Q \over {2\pi aA}}}}} \right)(1−2πaAQ1)Ca log (11−Q2πaA)\left( {{1 \over {1 - {Q \over {2\pi aA}}}}} \right)(1−2πaAQ1)Da2{a \over 2}2a log (1−Q2πaA)\left( {1 - {Q \over {2\pi aA}}} \right)(1−2πaAQ)Check answerSkip