What is the value of power factor for a pure resistor connected to an alternating current source?

Explanation

To find the value of the power factor for a pure resistor connected to an alternating current (AC) source, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Power Factor**:
The power factor (PF) is defined as the cosine of the phase angle (φ) between the voltage and current in an AC circuit. It is given by the formula:
\[
\text{Power Factor} = \cos \phi
...