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in Semiconductor Electronics: Materials, Devices and Simple Circuits by (26.1k points)
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The circuit diagram of a full wave rectifier is shown.

1. Explain how its works? Also draw the output wave form. 

2. If another diode is connected in series with D2, as shown below what will happen to the out put wave form?

3. If the frequency of a.c. at the input is 50Hz what will be the output frequency of full wave rectifier?

1 Answer

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Best answer

1. 

Full wave rectifier consists of transformer two diodes and a load resistance RL. Input a.c signal is applied across the primary of the transformer. Secondary of the transformer is connected to D1, and D2 . The output is taken across RL .

Working:

During the +ve half cycle of the a.c signal at secondary, the diode D1 is forward biased and D2 is reverse biased. So that current ows through D1 and RL

During the negative half cycle of the a.c signal at secondary, the diode D1 is reverse biased and D2 is forward biased. So that current flows through D2 and RL .

Thus during both the half cycles, the current flows through RL in the same direction. Thus we get a +ve voltage across RL for +ve and -ve input. This process is called full wave rectification.

2. Out put will be half wave.

3. 100 Hz.

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