The answer is A
Theory- a hypothesis or an educated guess that has yet to be proven by experiment<span />
The answer would be a motor. If thats one of the options, it was for me :)
Answer:
option (B)
Explanation:
Young's modulus is defined as the ratio of longitudinal stress to the longitudinal strain.
Its unit is N/m².
The formula for the Young's modulus is given by

where, F is the force applied on a rod, L is the initial length of the rod, ΔL is the change in length of the rod as the force is applied, A is the area of crossection of the rod.
It is the property of material of solid. So, when the 10 wires are co joined together to form a new wire of length 10 L, the material remains same so the young' modulus remains same.
Ina vacuum, it is a constant value that does not depend on the observer.