Question 12 when an electrical pulse on one wire is accidentally detected on another nearby wire, this is known as

An electric current has an associated magnetic field when the flow occurs in. This is also known as magnetic effect of current which has been observed and quantified by Ampere's Law.

Meanwhile, Current is produced in a conductor when it is moved through a magnetic field because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move. This process of generating current in a conductor by placing the conductor in a changing magnetic field is called induction. 

Hence, when a electric wire is placed nearby another wire carrying current, due to magnetic effect of current in the wire carrying electric current, current is induced in the wire. Hence the electric pulse and it is known as induction.

Answeroutward from: source;

An em wave does not require a medium, while a mechanical wave does.