Question

What is V IR?

Answer 1

The equation **V = IR** is known as **Ohm's Law**, which is a fundamental principle in electrical engineering. It relates the three basic electrical quantities:

- **V** is the **voltage** across a component (measured in volts).
- **I** is the **current** flowing through the component (measured in amperes or amps).
- **R** is the **resistance** of the component (measured in ohms, Ω).

So, the equation tells us that:

- Voltage (V) is equal to the current (I) flowing through a conductor times its resistance (R).
  
In simpler terms, if you apply a voltage across a material (like a wire or a resistor), it causes an electric current to flow through it. The resistance of the material opposes the flow of this current, and Ohm's Law helps you calculate the relationship between these quantities.

### Example:
If you know the resistance of a resistor is 5 ohms (R = 5Ω), and you apply a voltage of 10 volts (V = 10V) across it, you can calculate the current using the equation:

\[
I = \frac{V}{R} = \frac{10V}{5Ω} = 2A
\]

So, the current flowing through the resistor would be 2 amperes.