# Direct Current (DC) Training

### 401-01 Electron Theory

When you complete this lesson, you will be able to discuss basic electron theory and explain how the interaction between electrons and protons of atoms creates electrical energy. You will also be able to identify the factors that affect the movement of electrons, and explain how these factors are measured.

• Define electricity, current, voltage, and resistance
• Describe the structure of an atom
• Explain how voltage is produced
• Explain the term magnetic field

### 401-02 Magnetism and Electromagnetism Explained

When you complete this lesson, you will be able to describe the basic principles of magnetism.

• Describe the interactions between current, magnetic fields and stationary or moving conductors
• Describe the right-hand rules for conductors, electromagnets, and generators
• Describe the left-hand rule for motors

### 401-03 Ohm’s and Kirchoff’s Laws Relating to DC Circuits

When you complete this lesson, you will be able to describe Ohm’s law, the basic formula for finding power (in watts), and Kirchoff’s first and second laws as they relate to DC circuits.

• Explain Ohm’s as it relates to DC circuits
• Describe the formula for determining power in a DC circuit
• Explain Kirchhoff’s current law using a DC circuit example
• Explain Kirchhoff’s voltage law using a DC circuit example

### 401-04 Evaluating Series and Parallel DC Circuit Performance

When you complete this lesson, you will be able to describe how current, voltage, resistance, and power flow through series and parallel DC circuits. You will also be able to calculate values of current, voltage, resistance, and power flow in DC series and parallel circuits. Finally, you will be able to explain some techniques for evaluating DC circuit performance.

• Explain the manner current flows through DC series and parallel circuits
• Describe the method of determining voltage in DC series and parallel circuits
• Explain calculating resistance in DC series circuits
• Describe the calculations of power in DC series and parallel circuits
• Explain some techniques for evaluating DC circuit performance

### 401-05 Determine Circuit Outputs from Specified Inputs

When you complete this lesson, you will be able to use formulas to compute DC series and parallel circuit outputs based on the known inputs.

• Compute total current flow through a DC series circuit
• Compute total resistance in a DC series circuit
• Compute voltage drops across individual resistors in a DC series circuit
• Compute total voltage drop through all resistors in a DC series circuit
• Compute power dissipated in DC series circuits
• Calculate the total power in a DC series circuit
• Compute the current in branches of a parallel DC circuit
• Compute the total current in a DC parallel circuit
• Compute the potential (voltage drop) across resistors in a DC parallel circuit
• Compute power dissipated in the resistors of a DC parallel circuit
• Compute total power in a DC parallel circuit
• Compute the total resistance in a DC parallel circuit