Final answer:
Electricity is derived from coal, natural gas, oil, and renewable sources like wind and solar. Edison and Swan's contributions were pivotal, and Nepal's Pharping Hydroelectric Power Station marked the introduction of electricity in 1911.
Step-by-step explanation:
Electricity can be generated from various sources including fossil fuels like coal, oil, and natural gas, as well as from renewable energy sources such as wind, solar, and hydroelectric power. Thomas Edison and Joseph Swan played significant roles in the history of electric light, with Edison patenting the incandescent light bulb in 1879, allowing for widespread use of electric lights in homes and factories, while Swan's work in Britain also contributed to this revolution. In Nepal, electricity was first introduced during the rule of Rana Prime Minister Chandra Shumsher in 1911 with the establishment of the Pharping Hydroelectric Power Station.