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

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

View Answer

Answer: B