Question

Why Speed of light faster than the speed of electric current through a pure silver​

Answer 1

Explanation:

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The actual “speed of electricity” does not depend on the medium. It's always pretty close to the speed of light.

Of course, there are a couple of things that must be understood:

• What moves in a conductor is always a charged particle. In metals it's the electrons, and in organic tissue it's ions.
• The movement of charged particles is known as electric current. The speed of the particles is pretty slow by our standards, just a couple of cms per second.
• What travels at the speed of light is the wave that forces the charged particles along the conductor to move. I mean a wave of electromagnetic energy.

So no, electricity is just as fast on copper as in silver. The difference in resistivity between materials define how much current it will conduct for a given voltage, but it does not change the speed.