How did Thomas Edison's questions change as they reserched?

As Thomas Edison and his team conducted research, their questions evolved from general inquiries about electricity and its applications to more specific investigations focused on practical solutions and innovations. Initially, they sought to understand the fundamental principles of electrical phenomena, but as they progressed, their questions became increasingly directed toward developing efficient technologies, such as the incandescent light bulb and the phonograph. This shift from theoretical exploration to practical application guided their experimental methods and ultimately led to significant technological advancements.