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There are five lights in a classmate's home, and the current of each lamp is 150mA. There are also TV sets, refrigerators, fans and washing machines, which work at the same time They are 300mA, 1.5mA, 200mA and 1a. If the current in the trunk road is not allowed to exceed 3a, can these electrical appliances be used at the same time? Why? emergency
The refrigerator should be 1.5A. You wrote 1.5mA. Is it a clerical error?
If it's 1.5A, then the total current is
0.15 * 5 + 0.3 + 1.5 + 0.2 + 1 = 3.75a > 3a, so it should not be used at the same time
If the main current exceeds the rated value, it may trip or the line may burn out
PS, these appliances should be in parallel, so it's good to add the currents
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