What is the difference between the rated current and the fusing current of a fuse? What is the difference between them? Which fuse should be compared with the maximum current in the home circuit?

What is the difference between the rated current and the fusing current of a fuse? What is the difference between them? Which fuse should be compared with the maximum current in the home circuit?

The current of fuse is 1.25 times of rated current
To buy a fuse, you should compare the maximum current in the total circuit of a family

The fuse of Xiaohong's house often blows. Is the rated current of the fuse too small? Why?

1、 It is possible that the rated current of the selected fuse is too small. The principle of fuse selection is equal to or slightly greater than the rated current of the home circuit
2、 It is also possible that the total power of household appliances is too high

When the electric iron works, the power is 100W, the current is 400mA, and how much is the voltage?

P=UI
U=P/I=100W/0.4A=250V
Pay attention to the current conversion when using the formula, and pay attention to this point in all calculation problems

An electric iron working at a certain voltage has a power of 100W and a current of 454ma. The voltage applied to both ends of the iron is 100W______ ．

∵ P = 100W, I = 454ma = 0.454a, ∵ the voltage at both ends of the electric iron is: u = pi = 100w0.454a ≈ 220V