Question
Question: In a full wave junction diode rectifier the input ac has rms value of 20 V. the transformer used is ...
In a full wave junction diode rectifier the input ac has rms value of 20 V. the transformer used is a step up transformer having primary and secondary turn ration 1 : 2 The dc voltage in the rectified output is
A
12 V
B
24 V
C
36 V
D
42 V
Answer
36 V
Explanation
Solution
: here, inputVrms=20V
Peak value of input voltage
Vo=2Vrms=2×20=28.28V
Since the transformer is a step up transformer having transformer ratio 1:2the maximum value of output voltage of the transformer applied to the diode will be
Vo′=2×Vo=2×28.28V
∴dc voltage =π2Vo′=22/72×2×28.28=36V