6. Consider the two circuits, labeled I and Il, n the circuit below. All resisto

Question

6. Consider the two circuits, labeled I and Il, n the circuit below. All resistors have the same resistance R, and the batteries both have the same voltage V. Which of the following is true regarding the power Pt supplied by the batte ry in circuit I compared with the power Pu supplied by the battery in circuit 11? a. P 0.5 P b. Pl = 4P11 c, P,-P11 e. Pi=0.25 Pil A 3A current flows through a wire with a resistance of 0.5. Find the power generated by this current. 7, a. 1.5 W b. 0.75 W c. 4.5 W d. 2.25 W e. 3 W

Explanation / Answer

6) I = V/R

P1 =I^2 R = V^2/R

I = V/2R

P2 = I^2 *R = V^2 / 4R^2 * R= V^2 / 4R

P2 = = P1/4

P1 = 4P2

so option b) is the correct answer

7) Power = I^2*R = 3^2*0.5 = 4.5 W

so option c) 4.5 W is the correct answer

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