Electronics and Communication Engineering - Analog Electronics - Discussion


To prevent a DC return between source and load, it is necessary to use

[A]. resistor between source and load
[B]. inductor between source and load
[C]. capacitor between source and load
[D]. either (a) or (b)

Answer: Option C


Capacitor offers infinite impedance to DC.

Harshul Jain said: (Jul 29, 2014)  
What does return mean in this?

Shubham Shukla said: (Jan 10, 2015)  
Dc return replace by dc current and answer C is right because capacitor creates high reactance on low frequency current. Xc = 1/2piefc.

Jayasankar said: (Mar 14, 2015)  
Capacitor allows only AC but blocks DC.

Sakina said: (Aug 27, 2015)  
What is DC return?

Arnab said: (Jan 18, 2016)  
Have some doubts. The options should include diode, optocoupler etc. Because as caps blocks dc, there will be no current from source to load either. The purpose of using caps in dc circuit is to provide stability i.e. parallel connection across loads.

Akhil Manukonda said: (Jul 22, 2016)  
What is meant by dc return?

Deepika D said: (Aug 7, 2016)  
Then how the capacitor allows dc to flow from source to load?

Krishna said: (Sep 19, 2016)  
What is DC return?

Dee said: (Mar 4, 2017)  
InDC circuit by putting a cap in parallel how it provides stability?

Aziz said: (Aug 9, 2017)  
What is DC return?

Pramod said: (Aug 14, 2017)  
What is impedance?

Pallavi said: (Sep 6, 2017)  

Total opposition offered by an AC circuit to flow of AC is called impedance.

Dharmendra said: (Dec 11, 2017)  
DC Return means, sometimes the circuit gets reserve current called leakage current. In order to prevent return/excess currents, we have to use like Diodes or capacitors across affected elements.

Vikash said: (Apr 5, 2018)  
The capacitor will be polar type to use in between source and load.

Amar said: (Nov 12, 2018)  
In a DC, the value of capacitive reactance is infinite because of frequency zero so in dc no return path is there.

Rachana said: (Feb 5, 2019)  
capacitor blocks DC and allows AC,means it prevents the return of DC

Chandru said: (Dec 14, 2019)  
Prevent means to avoid DC so capacitor block dc.

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