The specific resistances of two metals differ by two times, how many times do the resistances
| February 7, 2021 | education
The specific resistances of two metals differ by two times, how many times do the resistances of wires made of these metals differ?
The resistance of the first conductor is calculated by the formula
R1 = p1 * L / A,
Where
R1 – resistance;
p1 is the resistivity of the conductor material;
L is the length of the conductor;
A – conductor cross-section.
Resistance of the second conductor
R2 = p2 * L / A;
p2 = 2 * p1;
R2 = 2 * p1 * L / A;
Find the resistance ratio
R2 / R1 = (2 * p1 * L / A) / (p1 * L / A) = 2.
Answer: the resistance is 2 times different.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
