When measuring the resistance of a multimeter, where should the black-tip pin be inserted into?
When measuring resistance with a multimeter, set the gear to "Ω", select the appropriate range, and the meter head will be connected in parallel and series with appropriate resistors. At the same time, a battery will be connected in series to allow current to pass through the measured resistor. Based on the magnitude of the current, the resistance value can be measured. When measuring, there is no polarity difference between "+" and "-" for resistance. When measuring polarized components such as crystal diodes and electrolytic capacitors, attention must be paid to the polarity of the probes.
When measuring DC current and DC voltage with a pointer multimeter, pay attention to the polarity of "+" and "-". If the pointer is found to be reversed, the probe should be replaced immediately to avoid damaging the pointer and header. However, when measuring DC current and DC voltage with a digital multimeter, if the polarity is reversed, it is not a big problem, only the display screen shows negative values.
