Muon ($$\mu $$^$$-$$) is a negatively charged (|q| = |e|) particle with a mass m_{$$\mu $$} = 200 m_e, where m_e is the mass of the electron and e is the electronic charge. If $$\mu $$^$$-$$ is bond to a proton to form a hydrogen like atom, identify the correct statements.
(A)   Radis of the muonic orbit is 200 times smaller than that of the electron.
(B)   The speed of the $$\mu $$^$$-$$ in the n^th orbit is $${1 \over {200}}$$ times that of the electron in the n^th orbit.
(C)   The ionization energy of muonic atom is 200 timesmore than of an hydroen atom.
(D)   The momentum of the muon in the n^th orbit is 200 times more than that of the electron.

A constant voltages is applied between two ends of a metallic wire. If the length is halved and the radius of the wire is doubled, the rate of heat developed in the wire will be :