Compute all parts of given question:
Question: A 460 W heating unit is designed to operate with an applied potential difference of 116 V.
Part A: By what percentage will its heat output drop if the applied potential difference drops to 112 V? Assume no change in resistance.
Part B: If you took the variation of resistance with temperature into account, would the actual drop in heat output be 1) larger or 2) smaller than that calculated in (a)?
I need tutor help to solve the above question and give the number of the correct answer.