Electrical Engineering ⇒ Topic : A.C. Voltage Divider

A.C. Voltage Divider

The voltage-divider rule as applied to series resistors in a d.c. circuit can also be applied to series impedances in an a.c. circuit. As always in an a.c. circuit, care must be taken to ensure that the phase angles are taken into account. Fig. (a) shows a series a.c. circuit consisting of a number of impedances. The voltage v_x across any impedance Z_x can be found by multiplying the applied circuit voltage by the ratio Z_x/Z_T i .e .

                                              figure (a)

Note that voltage-divider rule for a.c. circuits is identical in concept to that for d.c. circuits. In fact, voltage-divider rule is a useful shortcut to determine how series impedances will divide voltage