If R1 and R2 are connected in series to the same power supply, the power of R2 is P2. Then P1: P2 =?

If R1 and R2 are connected in series to the same power supply, the power of R2 is P2. Then P1: P2 =?

On the first floor, you seem to have made a mistake. The most important thing in this problem is to grasp the "same power supply" (the fruits of my hard work, I hope you can take a serious look, absolutely correct!). When R1 and R2 are in parallel, the current ratio is 1:2, because the voltage is equal when they are in parallel, R1 is calculated according to r = u / I; R2 = u / 1: U / 2 = 2:1, P1 is calculated below (because the same