Question

The speed at which the current travels, in conductor, is nearly equal to:
A) $3 \times {10^4}\,m{s^{ - 1}}$

B) $3 \times {10^5}\,m{s^{ - 1}}$

C) $3 \times {10^6}\,m{s^{ - 1}}$

D) $3 \times {10^8}\,m{s^{ - 1}}$

Answer 1

Hint:Electricity can be taken as an electromagnetic wave.
Waves that are generated as a result of vibrations between an electrical field and a magnetic field are electromagnetic waves or EM waves. In other words, oscillating magnetic and electric fields are made of EM waves.

Complete step by step solution:
In an electrical field, electricity is the passage of electrons through a conductor. The copper wire inside the cord serves as the connector in the event of an electric cord connecting a table lamp or some other household object to a power source.
This energy moves at around the speed of light, which is $670,616,629$ miles per hour, $1$ or $300$ million metres per second, as electromagnetic waves. The electrons themselves migrate more slowly inside the pulse, though. This notion is referred to as drift velocity.

Electrons are charged negatively. As part of the atom, some are set, and some freely travel around the solid grid of a conductor made of safe atoms. They produce an electrical charge as the free electrons bounce around.

How conductive it is determined by the amount of electrons that may pass about in a given substance. Some materials allow electrons to travel around more easily, such as the copper wire inside electrical cords, and, thus, conduct electricity better.

The propagation speed of the electrical current itself is around the speed of light, and just a few millimetres per second will pass the individual electrons inside the pulse. This is because the electrons themselves bounce around the conductor and produce, but do not actually pass along with, the energy that is emitted through the wave.

Hence, option D is correct.

Note:The speed of electricity is conceptually the speed of the electromagnetic signal in the wire, which is somewhat similar to the concept of the speed of light in a transparent medium. So it is normally lower, but not too much lower than the speed of light in the vacuum. The speed also depends on the cable construction.