How do you obtain steady dc output from the pulsating voltage?
Answers
The simplest way to obtain a steady DC output from the pulsating voltage is using a rectifier and then a capacitor.
RECTIFIER WORKING-
By using a half wave or full wave rectifier you can cancel the negative part if the pulsating voltage. This is done when a diode is connected in series with the input voltage. The diode allows only the phase in which it conducts. this way we can easily eliminate half pulsating cycle.
CAPACITOR WORKING-
The capacitor will get charged until the peak voltage and then starts discharging but on a very low rate. the time period of its discharging is quite high which is why before getting completely discharged it gets another pulse and start charging again.
In this way we get a steady voltage but not in an exact straight line. There are ripples present in it.
one solution to this is using a large capacitor with high capacitance to increase the time interval of capacitor discharging, as much as possible.
This is how we can get a steady DC from a pulsating AC.
Answer:
Explanation:
The DC Output is steady output as it is NOT varying
In a half wave rectifier, after crossing the diode the positive half remains and the negative half completely removed . ONLY the positive half remains.
Since only positive is available it is DC — and also it is varying between zero to positive maximum and down to zero it is like pulse. Hence Pulsating DC