An overhead projector is required to display content on transparencies. A transparency is a thin sheet of plastic in which light is reflected upon to display content.The light source emits light towards the transparency and then the image is displayed on the wall. Usually, this light source comes from below and lights upward and so the content is depicted above or overhead.
Errors in compilation happen, or it runs but then doesn't recognize the input. Also you can't transform into other types of variables.
I really think it A : pager
I hope this helps !!
Answer:the main signal bearing entities are voltage and their current in circuit environments.
Explanation: