Loading Effect of Voltmeter - Electrical4u

Loading Effect of Voltmeter

The uses of a voltmeter is to indicate the potential difference (Voltage) between two points in a circuit. When a voltmeter is connected across a circuit, it circuit is Shunts. If the voltmeter has a low resistance, it draws a substantial amount of current. This Cause lowers effective resistance of the circuit and changes  voltage reading. This is called the loading effect. 

• Loading effect reason due to low sensitivity of the voltmeter. When we make voltage measure in high resistance circuits, we Should use a high sensitivity voltmeter to stop the loading effect of the voltmeter. 

• The effect is less noteworthy in low resistance circuits because the loading effect is less.