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Axis ANVE Exam - Topic 4 Question 126 Discussion

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
B) It is easier to back-up DC with battery.
A) There is more energy in DC.
C) There is less power loss in cables with DC.
D) There is less risk for surge with DC.

Axis ANVE Exam - Topic 4 Question 126 Discussion

Actual exam question for Axis's ANVE exam
Question #: 126
Topic #: 4
[All ANVE Questions]

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

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Suggested Answer: B

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]


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Leota
3 days ago
More energy in DC? That’s a bold claim!
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Theodora
8 days ago
Surprised to hear about less power loss with DC!
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Pamella
14 days ago
I disagree, AC still has its advantages.
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Tresa
19 days ago
DC is definitely easier to back up with batteries!
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Corrie
24 days ago
Not sure about the surge risk claim, seems a bit exaggerated.
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Daniel
29 days ago
Less power loss in cables? That's a solid point!
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Edgar
1 month ago
Surprised to see DC gaining ground like this.
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Lashawnda
1 month ago
I disagree, AC still has its advantages!
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Yasuko
1 month ago
DC is definitely easier to back up with batteries.
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Maryann
2 months ago
Surge protection was mentioned in our notes, but I’m not clear if that’s a significant factor compared to the others.
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Alishia
2 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.
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Sheldon
2 months ago
I think we discussed how battery backup systems are easier with DC, so option B might be the right choice here.
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Delfina
4 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.
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