---
tags: [radio, ham-study]
---

# Electrical energy equations

## Voltage, current, resistance

![](../img/voltage-equation-ham.png)

### Voltage

$$
V = I \times R
$$

### Current

$$
I = \frac{V}{R}
$$

### Resistance

$$
R = \frac{V}{I}
$$

## Power, voltage, current

![](../img/power-equation-ham.png)

### Power

$$
P = V \times I
$$

### Voltage

$$
V = \frac{P}{I}
$$

### Current

$$
I = \frac{P}{V}
$$