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In many places 24 V AC has been popular as a power source but now 12 V and 24 V DC is increasing in popularity because
Suggested Answer: B
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12 V and 24 V DC power sources are becoming increasingly popular compared to 24 V AC because it is easier to back-up DC with batteries. DC power systems can be directly connected to battery backup systems without the need for conversion, making the implementation simpler and more reliable during power outages. This efficiency in backup capability is one of the primary reasons for the shift from AC to DC in many applications, including surveillance systems. [Reference: Axis Communications - Power over Ethernet for Network Cameras]
22 comments · newest first
MA
Marg
2 days ago
I agree, B makes sense. Easier to manage.
GR
Gretchen
7 days ago
I think B is the best choice. Battery backup is crucial.
AM
Amber
12 days ago
I lean towards C. Efficiency is key in installations.
LI
Lili
17 days ago
A seems off. DC doesn't necessarily have more energy.
DA
Dannie
23 days ago
D is interesting too. Safety matters with surges.
DE
Della
28 days ago
C is also strong. Less power loss is a big deal.
CH
Christene
1 month ago
I agree, B makes sense. Easier to manage.
BE
Bernardo
1 month ago
I think B is the best choice. Battery backup is crucial.
LA
Lavera
1 month ago
Totally agree, less risk for surges is a big plus!
LE
Leota
2 months ago
More energy in DC? That’s a bold claim!
TH
Theodora
2 months ago
Surprised to hear about less power loss with DC!
PA
Pamella
2 months ago
I disagree, AC still has its advantages.
TR
Tresa
2 months ago
DC is definitely easier to back up with batteries!
CO
Corrie
2 months ago
Not sure about the surge risk claim, seems a bit exaggerated.
DA
Daniel
2 months ago
Less power loss in cables? That's a solid point!
ED
Edgar
3 months ago
Surprised to see DC gaining ground like this.
LA
Lashawnda
3 months ago
I disagree, AC still has its advantages!
YA
Yasuko
3 months ago
DC is definitely easier to back up with batteries.
MA
Maryann
3 months ago
Surge protection was mentioned in our notes, but I’m not clear if that’s a significant factor compared to the others.
AL
Alishia
3 months ago
I feel like we had a practice question about power loss in cables, and I think DC does have advantages there, but I can't recall the specifics.
SH
Sheldon
4 months ago
I think we discussed how battery backup systems are easier with DC, so option B might be the right choice here.
DE
Delfina
5 months ago
I remember studying that DC is often more efficient for low-voltage applications, but I'm not sure if that's the main reason for its popularity.