Calculating Load Current

Once the peak voltage is find out, the peak load current is determined as

                                    I_L(pk) = V_L(pk)/R_L

Q:     Give the peak load current for the circuit shown in diagram.

SOLUTION:

            The input voltage is provided an rms value. This value is transformed to a peak value as follows:

                                                            V₁(pk) = V₁(rms)/0.707

                                                                                   = 200V_ac/0.707= 282.9 V_pk

                         The load voltage & current are found now, after fining peak voltage, like

                                                            V₂(pk) = N₂/N₁  V₁(pk)

                                                                           = (1/5)(282.9 V_pk) = 56.6V_pk

                        At last, the current & load voltage and current values are determined as:

                                                                         V_L(pk) = V₂(pk) - V_F

                                                                        = 56.6 - 0.7= 55.9V_pk

                        And the current shall be

                                                             I_L(pk) = V_L(PK)/R_L

                                                                       = 55.9 V_pk/10k= 5.59mApk