The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

AS physics electricity

20180629_023157-compressed.jpg.jpeg
20180629_023136-compressed.jpg.jpeg
can you please help me with the blue circled question?
It's a poor question, as it doesn't provide enough information, but I suspect that they're assuming that the only limiting factor for the power output is the internal resistance of the batteries. Think about how much power is wasted there.
try not to overcomplicate things, another way to define power is work done/time, time is workdone/power

time here is inversely proportional to power, so by halving power, you'd double time.
Original post by thotproduct
try not to overcomplicate things, another way to define power is work done/time, time is workdone/power

time here is inversely proportional to power, so by halving power, you'd double time.

No, that's over-simplifying it, and wrong.

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you