** Problem 2.1** Source:
Problem elaborated by the author of the site.

Knowing that copper resistivity is ^{-2} ohms. mm ^{2} / m ^{ -2 } ohms. mm ^{ 2 } / m

**Problem solving:**
click here!

** Problem 2.2** Source:
Problem 17 - page 161 - HALLIDAY, RESNICK,
WALKER, Jearl - Book: Fundamentos de Física - Vol 3 - Ed. LTC - 8ª edição - 2009.

An electric wire has

**Problem solving:**
click here!

** Problem 2.3** Source:
Problem 18 - page 161 - HALLIDAY, RESNICK,
WALKER, Jearl - Book: Fundamentos de Física - Vol 3 - Ed. LTC - 8ª edição - 2009.

A certain wire has a

**Problem solving:**
click here!

** Problem 2.4** Source:
Problem 21 - page 161 - HALLIDAY, RESNICK,
WALKER, Jearl - Book: Fundamentos de Física - Vol 3 - Ed. LTC - 8ª edição - 2009.

A wire with a resistance of

**Problem solving:**
click here!

** Problem 2.5** Source:
Problem elaborated by the author of the site.

Calculate the equivalent resistance _{eq}

**Problem solving:**
click here!

** Problem 2.6**
Source: Problem elaborated by the author of the site.

In the circuit shown in

**Problem solving:**
click here!

** Problem 2.7**
Source: Problem elaborated by the author of the site.

Calculate the equivalent resistance between the points

**Problem solving:**
click here!

** Problem 2.8**
Source: Problem elaborated by the author of the site.

Calculate the equivalent resistance between the points

**Problem solving:**
click here!

** Problem 2.9**
Source: Problem elaborated by the author of the site.

Calculate the equivalent resistance between the points

**Problem solving:**
click here!

** Problem 2.10**
Source: Problem elaborated by the author of the site.

Calculate the equivalent resistance between the points

**Problem solving:**
click here!

** Problem 2.11**
Source: Problem elaborated by the author of the site.

Calculate the equivalent resistance between the points

**Problem solving:**
click here!

** Problem 2.12**
Source: Problem elaborated by the author of the site.

In the circuit shown in the

**Problem solving:**
click here!

** Problem 2.13**
Source: Problem elaborated by the author of the site.

Calculate the equivalent resistance between the points

**Problem solving:**
click here!

** Problem 2.14**
Source: Problem elaborated by the author of the site.

Calculate the equivalent resistance between the

**Problem solving:**
click here!

** Problem 2.15** Source:
Problem elaborated by the author of the site.

Calculate the resistance that the circuit offers to the

**Problem solving:**
click here!

** Problem 2.16**
Source: Institute of Physics - Ufrgs -
Basic Eletronic discipline - List of exercises - Prof. Dr. Francis

In the circuit shown in

**Problem solving:**
click here!

** Problem 2.17**
Source: Problem 3.8b - page 55 -
NILSSON & RIEDEL - Book: Circuitos Elétricos - 8ª edição - Ed. Pearson - 2010

Calculate the equivalent resistance between the

**Problem solving:**
click here!

** Problem 2.18**
Source: Problem elaborated by the author of the site.

Calculate the value of _{ab} = R_{x}

**Problem solving:**
click here!

** Problema 2.19**
Source: Adapted of the Exercicie 2.31 - page 65 - THOMAS, Roland E. & ROSA, Albert J. & TOUSSAINT, Gregory J. - Book: The Analysis and Design of Linear Circuits
- 6ª edição - Ed. John Wiley & Sons, Inc. - 2009.

In the circuit shown in the

**Problem solving:**
click here!

** Problem 2.20**
Source: Problem elaborated by the author of the site.

Calculate the equivalent resistance between the

**Problem solving:**
click here!