Ans: The most important job of a stabilizer is to ensure that the output current is in the acceptable range of 220 V to 240 V. If the input voltage is less than 220 V, the stabilizer will increase the output voltage to reach a minimum level of 220 V. In this case, you term it as a step-up voltage stabilizer. However, if the input voltage is too high than the standard range, the stabilizer will reduce the voltage to maintain the required limits. Here, the device acts as a step-down stabilizer.