Final answer:
Without additional context and details about the type of irradiation or exposure, it is not possible to categorically say whether a sheet of copper metal is irradiated. 'Irradiated' implies exposure to radiation which can involve a range of phenomena in physics.
Step-by-step explanation:
When considering whether a sheet of copper metal is irradiated, it is important to understand what 'irradiated' means. In physics, 'irradiation' typically refers to the exposure of an object to radiation, which can range from infrared light to gamma rays. If we are discussing the interaction of copper with electromagnetic fields or radiation, we can relate it to several principles of physics.
For instance, it is true that when you drop a bar magnet through a copper tube, it induces an electric current in the tube, which is a result of Lenz's Law and electromagnetic induction. Similarly, it is true that a current is created in a photoconductive cell when at least one electron is expelled due to a photon strike. This is associated with the photoelectric effect, which is not exclusive to visible light but can occur with various types of electromagnetic radiation. Additionally, it is true that the electric-field lines from a positive point charge spread out radially and point outward due to the nature of electric fields.
However, the question as presented does not specify the kind of radiation the copper sheet is exposed to, nor does it specify the context in which the term 'irradiated' is being used. Therefore, based solely on the information given, it is not possible to determine whether the statement 'A sheet of copper metal is irradiated' is true or false without additional context detailing the type of irradiation and the conditions involved.