Three identical resistors each of resistance are connected across a battery of…
MATHEMATICS · Multi-part · ISC · Physics · Current Electricity · Electrical energy and power
Problem
Three identical resistors each of resistance R are connected across a battery of constant voltage V in two different ways—first all in series and then all in parallel.
(i) For the series arrangement, obtain an expression for the total power drawn from the battery in terms of V and R.
(ii) For the parallel arrangement, obtain an expression for the total power drawn from the battery in terms of V and R.
(iii) Comparing your results for parts (i) and (ii), state which arrangement draws more power and give a brief explanation for this difference.