First slide

Electrical power

Question

If power dissipated in $1 Ω$ resistor is 16 watt., total power consumed by the network between A and B is ______

Moderate

A

70 W
B

60 W
C

80 W
D

50 W

Solution

$\begin{array}{l} i_{1}^{2} \times 1 = 16 \Rightarrow i_{1} = 4 A . ∴ i_{2}^{} = \frac{4 \times 1}{4} A = 1 A m p . \\ ∴ T o t a l p o w e r c o n s u m e d = 16 + [{(1)}^{2} \times 4] + [{(4 + 1)}^{2} \times 2] W = 70 W . \end{array}$

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