Question

The power factor for an capacitive circuit (R-C load), in which the current leads the voltage, is said to be

(a) Lagging

(b) Leading

(c) One

Short answer

Answer

Therefore the correct option is (b) Leading

Step-by-step solution

Use theory of AC circuit for pure capacitive load

For a pure inductive load, the voltage into the load is in perpendicular with the load current, where voltage lead current in phase by $\mathbf{90}\mathbf{°}$. In this case power factor is leading.

For a pure capacitive load, the current into the load is in perpendicular with the load voltage, where voltage lag current in phase by $\mathbf{90}\mathbf{°}$. In this case, the power factor is lagging.

Thus the (b) is correct option.

Explanation for option (a\b)

For a pure capacitive load, the current into the load is in perpendicular with the load voltage, where voltage lag current in phase by $90°$. In this case, the power factor is lagging.

Thus the incorrect option is (a).

Explanation for option (b)

For a pure capacitive load, the current into the load is in perpendicular with the load voltage, where voltage lag current in phase by $90°$. In this case, the power factor is lagging.

Whereas the power factor,in option (c), is one. Thus the (c) is incorrect option.