GATE Papers >> EEE >> 2019 >> Question No 19

Question No. 19 EEE | GATE 2019

A six-pulse thyristor bridge rectifier is connected to a balanced three-phase, 50 Hz AC source. Assuming that the DC output current of the rectifier is constant, the lowest harmonic component in the AC input current is


Answer : (C) 250 Hz


Solution of Question No 19 of GATE 2019 EEE Paper

The lowest Harmonic content in the AC input current is 5th harmonics.

$ \mathrm f=5\times{\mathrm f}_{\mathrm s}=50\times5=250\;\mathrm{Hz} $

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