To calculate the overload current, 9% of the 40 amp original current rating is found, resulting in 3.6 amps, which is then added to the original rating to get a total of 43.6 amps flowing through the fuse during the overload.
The student's question asks for the amount of current that flows through a 40 amp fuse when it carries a temporary 9% current overload. To calculate this, we need to find 9% of the original 40 amps and then add this value to the original current rating of the fuse.
First, we calculate 9% of 40 amps:
0.09 (9%) × 40 amps = 3.6 amps
Now, we add the overload current to the original current rating:
40 amps (original rating) + 3.6 amps (overload) = 43.6 amps
Therefore, 43.6 amps of current flow through the fuse during the overload.