For example, measure the impedance of earplugs
May not。The "resistance" of the multimeter measures the DC resistance, plus the DC voltage.The impedance vector and DC resistance, inductance and capacitance, it has a very large relationship and the frequency of the power supply, in addition to pure resistance circuit, the impedance of a device or component is not equal to the DC resistance. To measure the impedance at a certain frequency, the AC voltage at this frequency should be added.
No, impedance contains resistors and reactance. The reactance is produced by nonlinear devices, such as inductors and capacitors. They are related to frequency!
Yes, but when you measure the current, the earplug makes a "rustling" sound, and you have to choose the 10 ohm block
Sure。The multimeter is also called the multiplex table, the multimeter, the three meter, the multiplication table and so on. It is an indispensable measuring instrument in the electric power and electronic departments. It is mainly used to measure the voltage, current and resistance. The multimeter is divided into a pointer multimeter and a digital multimeter according to the display mode. Is a multifunctional measuring instrument, multi range, general multimeter can measure DC current, DC voltage, AC current, AC voltage, resistance and audio level, some parameters can also be measured AC current, capacitance, inductance and semiconductor (such as beta) etc..
Even can use a multimeter to measure the impedance is also meaningless, because the frequency of different impedance inductance capacitance is different, as long as we know the DC resistance of inductance, capacitance, impedance can be calculated according to the need of different frequencies.
