Final answer:
Both the "T" fuse and the "K" fuse will blow at the same time when the current exceeds 15 amps since they are rated for the same amperage.
Step-by-step explanation:
An 1800-W toaster, 1400-W electric frying pan, and 75-W lamp in a 15-A, 120-V circuit will collectively draw 27.295 A, which will blow the 15-A fuse.
If 100 amps of current is applied to a 15 amp "T" fuse and a 15 amp "K" fuse, the question is asking which fuse will blow first. The types of fuses, whether "T" or "K", are designed to respond to overcurrent conditions differently, with "T" generally indicating a time-delay fuse and "K" potentially representing a fast-acting type. However, in this case, as both are rated for 15 amps, the moment the current exceeds this rating, both fuses will likely blow.
Now, considering the example of an 1800-W toaster, a 1400-W electric frying pan, and a 75-W lamp plugged into a 15-A, 120-V circuit, we need to calculate the current drawn by each and determine if they will blow the fuse. The current drawn by each device is calculated by dividing the power rating by the voltage. Here, the toaster draws 15 A, the frying pan 11.67 A, and the lamp 0.625 A. Summing these up gives a total current of 27.295 A, which exceeds the 15-A rating of the fuse, indicating that the fuse will definitely blow.