In a VOM’s voltage multiplier, why are resistors important?

In a VOM (Volt-Ohm-Milliammeter) voltage multiplier, resistors play a crucial role primarily in the voltage scales. The purpose of the voltage multiplier circuit is to increase the output voltage in relation to an input voltage. Resistors are used in these circuits to help in voltage division and to limit the current, which ensures that the circuit operates within safe limits.

When measuring higher voltages, the resistor values are carefully chosen to maintain accuracy and stability in the readings. They help to manage the impedance of the circuit, preventing overloading of the internal components of the VOM. By doing so, the resistors allow the VOM to provide correct voltage scale readings without risking damage to the device itself or producing inaccurate measurements.

In other areas such as frequency, current, or power scales, the specific roles of resistors may not be as directly tied to the primary function of voltage multiplication. While resistors are important components in electronic circuits in general, their essential function in voltage multipliers is particularly focused on maintaining the integrity of voltage measurements.