A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 . If each resistor is operating in the circuit at its maximum power dissipation, total current flow is

A certain series circuit consists of a 1/8 W resistor, a 1/4 W resisto

1.	A certain series circuit consists of a 1/8 W resistor, a 1/4 W resistor, and a 1/2 W resistor. The total resistance is 1200 . If each resistor is operating in the circuit at its maximum power dissipation, total current flow is
Answer» Total P = P1 + P2 + P3 = 7/8w. P = I2R. I = sqrt (P/R) Now, P = 7/8w, R = 1200 ohm. Therefore, I= sqrt ( (7/8)/1200 ) = 0.0270030862 = 27 mA.