Answer: Battery
Explanation:
A battery is a source of energy. A battery stores energy in the form of chemical energy and when placed in the circuit, the chemical energy converts to electrical energy. Thus, it is not used to detect radioactivity.
Cloud chamber, Geiger counter and photographic film are used to detect radioactivity. A Geiger counter consists of tube filled with gas which gets ionized from radioactive decay. The ionized gas produces electric current which is detected and measured. Photographic film is a photo-sensitive strip which used to detect radiations. Cloud chamber is a particle detector and their trajectories.
