Why do you use a multiplier in designing a basic voltmeter?

A multiplier is used in designing a basic voltmeter to extend the measurement range of the device without requiring a high internal current. It allows the voltmeter to measure higher voltage levels safely by dividing the voltage across a resistor network, which reduces the voltage seen by the sensitive components. This ensures accurate readings while protecting the meter from damage due to excessive voltage. Additionally, using a multiplier helps maintain a higher input impedance, minimizing the loading effect on the circuit being measured.