Explain V-I graph for a copper voltmeter.

Explain, why carbon can reduce copper but not calcium oxide to calcium?

Explain how a Galvanometer can be converted into Voltmeter.

Explain how a Galvanometer can be converted into voltmeter

Explain the following : Why are copper and aluminium usually employed for electricity transmission?

These days people use steel utensils with copper bottom. This is supposed to be good for uniform heating of food. Explain this effect using the fact that copper is the better conductor.