Loading effect means measuring the difference between voltage without connection and load after connection. Voltmeter works by following this rule. It is very simple to use. This blog will give information about its working procedures.
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What Is Loading Effect?
The voltmeter is parallel to the load. When it is connected across a high resistance load, it creates a low resistance parallel path for the current to pass through it, thus reducing the overall resistance of the format and thus reducing the voltage drop across it, causing incorrect readings by the voltmeter. This effect is called the loading effect.
Measurement of Loading Effect
The measurement of the loading effect is straightforward. We can measure the loading effect in two ways. The first one is the loading effect of voltmeters and the second one is the loading effect of the ammeter.
Loading Effect of Voltmeter
The voltmeter is connected in parallel to the electrical components for measuring voltage. Voltmeters are usually designed to withstand 10 to 20 MΩ of internal resistance. Errors can be measured in two cases by a voltmeter.
- First: The overall resistance of the circuit changes when the voltmeter is connected to a very high external resistance.
- Second: The circuit’s overall resistance changes when the voltmeter’s internal resistance is small.
Loading Effect Of The Ammeter
The ammeter is connected in series to the electrical components for measuring voltage. Voltmeters are usually designed to withstand 10 to 100Ω of internal resistance. Errors can be measured in two cases by an ammeter.
- First: The overall resistance of a circuit extends to a significant extent when the ammeter is connected to a low resistance circuit.
- Second: The circuit’s overall resistance changes when the ammeter’s internal resistance is small.
Also known as loading effect load regulation. Which can determine the power supply’s output value during a load change. Thus when a power supply controls its output voltage in a constant voltage mode, it determines the constant DC output voltage or current maximum change when the current changes and tells how much the voltage can change.