# Comparisons

## Difference Between AC & DC Voltage

The major difference between the AC and DC voltage is that in AC voltage the polarity of the wave changes with the time whereas the polarity of the DC voltage always remains same. The other differences between the AC and DC voltage are shown below in the comparison chart. Content: AC Voltage Vs DC Voltage Comparison …

## Difference Between AC & DC Transmission Line

The most crucial difference between the AC and the DC transmission line is that the AC transmission line uses three conductors for power transmission whereas the DC transmission line requires two conductors. The other differences between the AC and DC transmission lines are explained below in the comparison chart. The transmission line is a closed …

## Difference Between LVDT & RVDT

One of the significant difference between the LVDT (Linear variable differential transformer) and the RVDT (Rotatory Variable Differential Transformer) is that the LVDT changes the linear motion into the alternating electrical signals whereas the RVDT translate the angular displacement into an electrical signal. The other differences between the LVDT and RVDT are shown below in …

## Difference Between Active & Reactive Power

The most significant difference between the active and reactive power is that the active power is the actual power which is dissipated in the circuit. Whereas, the reactive power is the useless power which only flows between the source and load. The other differences between the active and reactive power are explained below in the comparison …

## Difference Between Eddy Current & Hysteresis Loss

The most significant difference between the Eddy current and Hysteresis loss is that the eddy current loss occurs because of the relative motion between the conductor and the magnetic field. Whereas the hysteresis loss occurs because of the reversal of the magnetism. The other differences between the hysteresis and the eddy current loss are explained …

## Difference Between Three Point & Four Point Starter

The starter is a device which is used to start and run the motor. The most significant difference between the three point and the four-point starter is that in three-point starter the no voltage coil (NVC) is connected in series with the field winding whereas in four-point starter the NVC is directly connected to the …

## Difference Between LED & Diode

The most significant difference between the LED and diode is that the LED emits the light while the diode allows the current to flow only in one direction and opposes the flow in the opposite direction. The other differences between the diode and LED are shown below in the comparison chart. The LED is a …

## Difference Between Open Loop & Closed Loop System

One of the significant difference between the open loop and closed loop control system is that in an open loop system the desired output does not depend on the control action. While in the closed loop system the desired output depends on the control action of the system. The other differences between the open and …

## Difference Between Active & Passive Transducer

The most crucial difference between the active and passive transducer is that the active transducer does not use any external power source for producing the output, whereas the passive transducer requires the additional energy source for working. The other differences between active and passive transducer are explained below in the comparison chart. The physical forces …

## Difference Between Wattmeter & Energy Meter

The significant difference between the Wattmeter and the energy meter is that the Wattmeter measures the electrical power flows in the circuit, whereas the energy meter measures the total electrical energy consumes by the electrical load. The other differences between Wattmeter and Energy Meter are represented below in the comparison chart. Before knowing the differences …