The term `cosphi` in an `AC` circuit is called

Options

A. form factor
B. phase factor
C. power factor
D. quality factor

Explanation

To solve the question regarding the term `cos phi` in an AC circuit, we will analyze the options provided and understand the significance of `cos phi` in the context of AC circuits.

### Step-by-Step Solution:

1. **Understanding the Terms**:
- In an AC circuit, various factors can affect the power consumed, including resistance, inductance, and capacitance. The term `cos phi` relates to the phase difference between the voltage and the current.

2. **Identifying the Power Formula**:
- The average power (P) consumed in an AC circuit can be expressed as:
\[ P = I_{\text{rms}} \times V_{\text{rms}} \times \cos \phi \]
- Here, \( I_{\text{rms}} \) is the root mean square current, \( V_{\text{rms}} \) is the root mean square voltage, and \( \cos \phi \) is the cosine of the phase angle between the current and voltage.

3. **Relating to Power Factor**:
- The term `cos phi` specifically represents the power factor of the circuit. The power factor is a measure of how effectively the current is being converted into useful work output and is defined as the ratio of the real power flowing to the load to the apparent power in the circuit.

4. **Evaluating the Options**:
- The options given are:
- Form factor
- Phase factor
- Power factor
- Quality factor
- Among these, the term that directly corresponds to `cos phi` is the **power factor**.

5. **Conclusion**:
- Therefore, the term `cos phi` in an AC circuit is called the **power factor**.

### Final Answer:
The term `cos phi` in an AC circuit is called the **power factor**.

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