Power in Circuits - IB Physics

0:00 Power Equation in Circuits
0:59 Example Problem 1
2:14 Example Problem 2
3:29 Power is Greater in Parallel

[shloksingh]

For example problem 1, cant we just use V^2/R = 30^2/15 = 60 W

[shloksingh]

For example 3 cant we just add up reciprocals of resistance and then change numerator and denominator value to get actual resistance, and then use V^2/R?

[mrkhunt.]

For problem 1, isn't it much simpler to just use V^2/R to get 60W

[lmitchell]

Good video but your going really fast so it’s hard to understand