1 Answer
To convert voltage (V) to watts (W), you need to know the **current (I)** as well. The formula to convert is:
\[
\text{Power (W)} = \text{Voltage (V)} \times \text{Current (I)}
\]
Where:
- **Power (W)** is in watts,
- **Voltage (V)** is in volts,
- **Current (I)** is in amperes (A).
### Example:
If you have a voltage of 12V and the current is 2A, the power is:
\[
P = 12V \times 2A = 24W
\]
So, the power is 24 watts.
If you don't have the current and only have resistance (R), you can use Ohm's law:
\[
I = \frac{V}{R}
\]
Then, substitute this into the power formula:
\[
P = V \times \left( \frac{V}{R} \right) = \frac{V^2}{R}
\]
So if you know the voltage and resistance, you can calculate power using \( P = \frac{V^2}{R} \).
\[
\text{Power (W)} = \text{Voltage (V)} \times \text{Current (I)}
\]
Where:
- **Power (W)** is in watts,
- **Voltage (V)** is in volts,
- **Current (I)** is in amperes (A).
### Example:
If you have a voltage of 12V and the current is 2A, the power is:
\[
P = 12V \times 2A = 24W
\]
So, the power is 24 watts.
If you don't have the current and only have resistance (R), you can use Ohm's law:
\[
I = \frac{V}{R}
\]
Then, substitute this into the power formula:
\[
P = V \times \left( \frac{V}{R} \right) = \frac{V^2}{R}
\]
So if you know the voltage and resistance, you can calculate power using \( P = \frac{V^2}{R} \).