Why is the current limiting circuit used to measure the resistance of wire by voltammetry?
Because the resistance of wire is very small, almost zero. According to the current, equal to the voltage divided by the resistor, it is known that the resistance is almost an hour and the current is close to infinity. This will burn out the power supply, so the current limiting method must be used
Under normal circumstances (to meet the safety conditions), because the current limiting circuit energy consumption is small, the connection is simple, therefore, priority is given to the current limiting method
Sliding rheostat, voltage sharing method and current limiting method can adjust the load current (voltage), but under the same conditions, the adjustment effect is different, the actual application should be based on the appropriate choice of appropriate methods.
