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Voltage, Current and Resistance

Q1:

The current in a given circuit is not to exceed 24 A. Which value of fuse is best?

A a fuse is not necessary

B 10 A

C 24 A

D 20 A

ANS:C - 24 A

For 24A Current we cannot use 24 A Fuse.
Let's understand this concept:

P=IV => 24A*230V= 5,520W
P=IV => 25A*230V= 5750W.

According to a selection of fuse Parameters:

For Power Rating less than 5520W we can use 24A Fuse.
But for power rating Greater than and equal to 5520W, we would use a fuse rating greater than 24A like 25A fuse.



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