# Calculating voltage and current using a diode and an alternating current.

#### Teee

Joined Nov 11, 2012
6
Given that the positive peak voltage is 5v and negative peak voltage is -5v.

How would you prove that the graph would eventually be rectified?
How does the negative half-cycle current and voltage be stopped by the diode when it can also bypass it because it has the correct polarity?

#### tshuck

Joined Oct 18, 2012
3,534

#### Teee

Joined Nov 11, 2012
6
but how does the circuit works? At the negative cycle of the Ac voltage, -5 will flow along that blue arrow, then it'll hit the diode but it's at the correct polarity. I don't get how correct polarity gets the voltage rectified.. am I even getting the concepts of AC voltages correct?

#### Jony130

Joined Feb 17, 2009
5,230
At the negative cycle of the AC voltage current don't flow because diode is reverse-biased. So if no current is flow through resistor and there will be no voltage drop across resistor.

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