If the two fixed value resistors R1 and R2 are connected to the power supply in one way, the power consumed by R1 is 9 watts; if the two resistors are connected to the power supply in another way, the power consumed by R1 is 16 watts, and the current passing through R2 is 4a. What are the power supply voltage and the resistance values of R1 and R2

If the two fixed value resistors R1 and R2 are connected to the power supply in one way, the power consumed by R1 is 9 watts; if the two resistors are connected to the power supply in another way, the power consumed by R1 is 16 watts, and the current passing through R2 is 4a. What are the power supply voltage and the resistance values of R1 and R2

First of all, the first connection R1 consumes 9W power, the second connection R1 consumes 16W power. According to the formula P = u ^ 2 / R, the voltage of the second connection R1 is larger than that of the first connection. It shows that the first connection R1 and R2 are series connection, and the second connection R1 and R2 are parallel series connection