a wire a battery a resistor a light bulb
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: An Italian scientist named Alessandro Volta invented the Voltaic pile in 1800. It was able to produce a steady electrical current. Based on this description, what is the modern equivalent of the Voltaic pile?
Possibilities:
- a wire
- a battery
- a resistor
- a light bulb

a battery