hello, i dont know how to calculate the pd , can you help me to solve this question:-
What is the pd across an immersion heater element which changes 3.6 x 103J of electrical energy into heat every second and takes a current of 15 A?

Question

hello, i dont know how to calculate the pd , can you help me to solve this question:- 
What is the pd across an immersion heater element which changes 3.6 x 103J of electrical energy into heat every second and takes a current of 15 A?

anonymous · Answer

pd is the potential difference (voltage) across the element

anonymous · Answer

$$Power =IV =\frac{ QV }{ t } =  \frac{ Workdone }{ time }$$

anonymous · Answer

Workdone on heating element = amount of electrical energy turned into heat

anonymous · Answer

Now we can use that equation to find the p.d across the element each second
$$P =  \frac{ 3.6 \times 10^3 J }{ 1 s } = 15A \times V \rightarrow V = 240V$$