Hello everyone!
This is a question that has been bothering me for some weeks now. I am having trouble understanding why we need diodes at all for a center-tapped fullwave rectificer circuit. My flawed understanding about electricity is telling me that rectification should be achieved even if I replace the diodes with resistors (forgive me for unashamedly making such a preposterous statement).
I have attached two diagrams - one for the positive cycle of the AC input and the other for the negative one - of what I think should happen in a center-tapped full-wave rectifier circuit consisting of three resistors, an AC source and a transformer.
In the diagram, the resistor in the middle is my output. I have drawn current directions in the diagrams according to my understanding. As you can see, in both the diagrams i.e during one full cycle of the input AC cycle, the current through the middle resistor is invariably unidirectional. But that's obviously not what would actually happen in a real circuit. Resistors can't rectify, but I am speaking on the basis of the circuit geometry alone, which suggests (to me) that the current through that middle resistor must be unidirectional!
I can't see how it is possible for current to reverse its direction through the load in this particular circuit? That's what I need help in understanding.
Please help me realize the silly mistake I am making. It really upsets me when I can't understand some theoretical principle even after giving it much time and thought.
I'd be extremely grateful for your time, patience and response.
Thank you!
This is a question that has been bothering me for some weeks now. I am having trouble understanding why we need diodes at all for a center-tapped fullwave rectificer circuit. My flawed understanding about electricity is telling me that rectification should be achieved even if I replace the diodes with resistors (forgive me for unashamedly making such a preposterous statement).
I have attached two diagrams - one for the positive cycle of the AC input and the other for the negative one - of what I think should happen in a center-tapped full-wave rectifier circuit consisting of three resistors, an AC source and a transformer.
In the diagram, the resistor in the middle is my output. I have drawn current directions in the diagrams according to my understanding. As you can see, in both the diagrams i.e during one full cycle of the input AC cycle, the current through the middle resistor is invariably unidirectional. But that's obviously not what would actually happen in a real circuit. Resistors can't rectify, but I am speaking on the basis of the circuit geometry alone, which suggests (to me) that the current through that middle resistor must be unidirectional!
I can't see how it is possible for current to reverse its direction through the load in this particular circuit? That's what I need help in understanding.
Please help me realize the silly mistake I am making. It really upsets me when I can't understand some theoretical principle even after giving it much time and thought.
I'd be extremely grateful for your time, patience and response.
Thank you!
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