Copper wires are generally used for electrical power transmission instead of iron wire because : A. Copper is cheaper than iron B. Copper is lighter than iron C. Copper is a better conductor of electricity than iron D. Copper can take higher power than iron

The correct answer is: Copper is a better conductor of electricity than iron.

Copper is a better conductor of electricity than iron because it has a higher electrical conductivity. This means that copper can carry more electricity with less resistance. This is important for electrical power transmission, where the wires need to be able to carry a lot of electricity without overheating.

Iron is also a conductor of electricity, but it is not as good as copper. This is why copper is used for electrical power transmission instead of iron.

Here is a table showing the electrical conductivity of some common metals:

Metal | Electrical conductivity (Siemens per meter)
——- | ——–
Silver | 63,570
Copper | 58,500
Gold | 45,000
Aluminum | 36,800
Iron | 10,000

As you can see, copper has a much higher electrical conductivity than iron. This is why copper is used for electrical power transmission instead of iron.