I imagine a world like Earth, only without easy mineable copper (say, where copper was as rare as gold). That means no brass nor bronze too (they are copper alloys).
I presume prehistoric humans could discover metallurgy using other easily melted metals (tin, lead). So they would pass directly from stone age to iron age.
I don't know if steam engines would be feasible. Do they require any significant amount of copper, brass or bronze?
Electricity could be discovered using batteries based on zinc or lead, but without copper wiring it would remain little more than a scientific curiosity.
Electric motors and generators require large amount of wiring, so they are impossible to build on large scale in this world. Some small units could perhaps be made using silver wiring in place of the copper ones.
Possibly, wiring in internal combustion engines could also be made out of silver. That would make them very expensive, though.
Aluminum, which requires large amount of electricity to be refined from ore, would be a rare metal, therefore airplanes, if ever developed, would be made out of wood.
In sum, that would mean a world fixed at a tech level of the late 1800, gaslit and with very few cars, with very expensive air travel, no telegraphs nor phones, nor radio, with only mechanical computing machines. Edison would be mainly known for the phonograph.
Any other thoughts ?
UPDATE: if there is no economical way to produce and distribute electricity, a lot of conseguences would follow for the organization of society. Instead of huge power plants that serve millions of users located perhaps hundreds of miles away, there would be small plants serving a single building or city block, distributing energy in form of steam or compressed air. There would probably be no "NIMBY" movements, given that there would be no alternative to a plant in each backyard. I wonder if this would lead to a more or a lesser "green" society. Also living "off the grid" would be the norm, not the exception.