An electro-magnet.
yes we can produce electricity without magnetism by using semiconductor for example photo diode is used in solar cells.
No. but he used an electromagnet to make discoveries about electricity.
A time-varying magnetic field can be used to induce a current in an inductor
When current flows in a conductor there is a magnetic field formed around the conductor. This magnetic field can be used to make an electric magnet (like the ones used at junkyards), motors also use magnetism to operate, and many switches (solenoid, motor starters, and relay switches) use magnetism to open or close.
Any time an electrical current flows, it will automatically be surrounded by a magnetic field.
Magnetism provides a means of converting motion into electricity, by means of an electric generator, and also of converting electricity into motion, by means of an electric motor. These are both extremely useful things to do, which are fundamental to our entire technological society. In addition magnetism can be used to record information, and is used in computers for that purpose.
Your question is ambiguous. Are you asking why gravity exists or is gravity or more to the point can Gravity/Magnetism be used as an energy source.
Hans Christian Oersted discovered the relationship between electricity and magnetism in 1820 when he observed that an electric current flowing through a wire caused a nearby compass needle to deflect. This observation demonstrated that an electric current produces a magnetic field.
a solar farm can be used to generate electricity. for example if you had a wind mill or water wheel.
Electricity started to be used in 1816. During the 1840s when electrical telegraphs were being used electrical lines were being built across the United States.
An example of a device that uses both magnetism and electricity is an electric motor. Electric motors contain coils of wire that produce a magnetic field when an electric current is passed through them, interacting with permanent magnets to generate motion. This principle is used in various applications, such as in vehicles, appliances, and industrial machinery.
The Greeks used the amber to study the concept of magnetism for the first time . They observed that it acquires a strange property of attracting tiny bits of papers,metal pieces etc. when rubbed with a piece of wool .this strange characteristic of it made the further discoveries possible.+++That's not magnetism but static electricity, the charge being developed by rubbing the amber with the dry cloth. Amber is non-magnetic.