2. 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 Ω. If each resistor is operating in the circuit at its maximum power dissipation, total current flow is ________.

(a) 27 mA (b) 2.7 mA (c) 19 mA (d) 190 mA

Answer

Answer : (a)

Explanation

Explanation : 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.

Product Condition: No Defects; Kulshreshtha, D C (Author); English (Publication Language); 880 Pages - 07/01/2017 (Publication Date) - McGraw Hill Education (Publisher)

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