First slide

Rectifiers

Question

In a full wave rectifier circuit operating from 90 HZ mains frequency. The fundamental frequency in the ripple would be

Moderate

A

50 HZ
B

25 HZ
C

180 HZ
D

70.7 HZ

Solution

Given f = 90 HZ T = $\frac{1}{90}$
For full wave rectifier , $T_{1} = \frac{T}{2} = \frac{1}{180}$
$∴ f_{1} = 180 H Z (∴ f = \frac{1}{T})$

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