relationship youll Box #3 Box #1 : The dotted The bulbs and batteries in the cir

Question

relationship youll Box #3 Box #1 : The dotted The bulbs and batteries in the circuits above are identical. boxes in each circuit are similar to the boxes on the previous page except that the contents of these boxes are visible. on 8 Rank the five bulbs (B, D, E, G and H) according to brightness, from brightest to dimmest. on9 Rank the three batteries (A, C and F) according to the current thru each from biggest to smallest on 10 Rank the three boxes (#1, #2 and #3) according to the total resistance contained within each, from biggest to smallest. Explain your reasoning. tion 11 Two students are discussingthe answerto question 8: Student #1 : The resistance of box #3 is greater than #1 because box Student #2: No. Box #3 has less resistance than box #1 because there #3 contains more bulbs. is more current flowing thru battery F than A. With which student do you agree? Explain your reasoning

Explanation / Answer

Question 8:

The bulbs in parallel have least net resistance and hence highest current and hence, G and H are brigtest.

Single bulb has less resistance that bulbs in series and hence it has more current than series of bulbs.

Hence, order is G=H,B, D = E

Question 9:

As least resistance is with battery F, and A has less than C, then current from highest to lowest is

FAC

Question 10:

Box 2 highest, box 2, then box 3 least

Question 11:

Student 2 is correct because resistance in parallel curcuits always less than the single resistance of same magnitude.

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