H2SO4 is not metals. These two can go together and make H2.
If the metals are melted together the result is called an alloy, if not melted together the result is called a mixture.
Copper and tin.
Alloy is the name for at least two different metals melted and blended together. Most of the metals we use are alloys, as their characteristics are usually better than the base metals.
Electricity i.e. a battery, can be made by taking two different metals (maybe that's where your confusion came in) - for example, copper and zinc, and submerging them into a an acid solution (like vinegar). Or you can take those same to metals and stick them into a lemon. If you put a volt meter on the two different metals you will measure a small, but noticeable, current. But to answer your queston, you will not make electricity by rubbing two pieces of metal together.
H2SO4 is not metals. These two can go together and make H2.
A metal and a non metal. Two non metals. A metal and a metalloid.
Yes, Sterling and Platinum can be combined either by soldering or brazing the two metals together, riveting the metals together, or alloying the two metals. The jeweler who fabricates a piece out of the two metals must have two separate and distinct sets of tools that are used specifically for the two metals to avoid tool and metal contamination.
If the metals are melted together the result is called an alloy, if not melted together the result is called a mixture.
it is made by two or more metals come together.
it becomes an alloy
No: Two metals mixed together form a special kind of homogeneous mixture called an "alloy".
Many alloys are made by melting metals and mixing them together in carefully measured amounts.
Tin and copper.
it is made by two or more metals come together.
thermocouple
Copper and tin.