When an atom emits radiation
A) an electron moves in precisely one complete orbit around the nucleus.
B) a photon makes a quantum jump from one quantum state to another.
C) an electron makes a quantum jump from one quantum state to another.
D) a proton strikes a neutron to create a photon.
E) it emits a small portion of its electric charge.
Question 2
A certain fuse blows if the current in it exceeds 1.0 A, at which instant the fuse melts with a current density of 620 A/cm2. What is the diameter of the wire in the fuse?
A) 0.45 mm
B) 0.63 mm
C) 0.68 mm
D) 0.91 mm
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