What do you use to measure large current above 1A? Thank you, What do you use to measure the large current above 1A? Use a multimeter in series in the circuit, or use some other method?

1a-2a I usually connect 1 ohm resistance in series, measure the voltage drop on the resistance, and calculate the current. When the resistance is above 2a, use 0.22 ohm, and directly connect the digital meter in series on the high current circuit to measure, the error is very large, because the contact resistance is very large, and the welding is only done because the resistance at the contact point is large. I have tried to use the series connection method to measure the charging current of 3A car battery, and the voltage drop is 0.65v when the digital meter is connected in series with 0.22 ohm, Look at the error

When Xiaoming has three lamps, a refrigerator and an electric iron working at the same time, the current through each lamp is 0.2A, the current through the refrigerator is 1a, and the current through the electric iron is 2.3A. What is the current in the trunk road?

In the parallel circuit, the current in the main circuit is equal to the sum of the currents in each branch. When they work at the same time, the current intensity in the main circuit: I = I1 + I2 + I3 = 3 × 0.2A + 1A + 2.3A = 3.9a. A: when three lamps, a refrigerator and an electric iron work at the same time, the current in the main circuit is 3.9a

3. When a household refrigerator works normally, the current is closest to ()
3. When a household refrigerator works normally, the current is closest to ()
A.1A B.1.5mA C.0.1A D.100A

Refrigeration 1.1 amp
Standby less than 0.1 A
Household refrigerators are generally around 1a
So choose a

The current of household refrigerator is about 1a, which is indicated by the symbol "a"?

I=1A

What do you use to measure large current above 1A? Thank you, What do you use to measure the large current above 1A? Use a multimeter in series in the circuit, or use some other method?