I came to think about this today. I was using my Prestige Induction for 1 year. When the power is upto 500, the heating doesn't work continuously. It heats for 4-5 seconds, then pauses for 1 second without any error message. This didn't irritate me actually, as I thought it is the function. Same doesn't happen when temperature is higher than 500. Heating works continuously.
So is it really a function/feature of induction cooktops? Or is it technical problem with induction or cookware?