New Tab biackboard.com/webapps/assessment take/launchJsp?course assessment d__10
ID: 1781546 • Letter: N
Question
New Tab biackboard.com/webapps/assessment take/launchJsp?course assessment d__107077_1&course; d24488_1&content; de-1174 181_1&.. e Sketch The Curve o y, La w D Close n sea ume n ke·log·we m a tegral Graphing Calculano Calculus 10e M Chapter 4 Assign -3 a Question Oonpletion Status: QUESTION 2 10 points Save Answer 46 v R2 in the image above, what is the total resistance in the circuit? Hint do the paralel frst) 288 ohm O 17.7 ohm O 128 ohm 0 92 chm QUESTION 3 10 points Save Answer What is the total resistance ofaorcut when R1 (7k )sin senes with a parase combination of R2 (20 kn),R3(3on). and R. (45 KO)? O 41 k ohnm O 108 k ohm QUESTION 4 10 points Save AnawerExplanation / Answer
Answer 2. R2, R3 and R4 are in parallel
Therefore 1/Rparallel= 1/R2 +1/R3+1/R4
= 1/80 +1/60 +1/80= 0.0125+ 0.01667+ 0.0125=0.04167
Rparallel= 1/0.04167= 23.998 ohm
Now, Rparallel is in series with R1 , therefore Rtotal= R1+Rparallel
= 68+ 23.998
= 91.998 ohm ~ 92 ohm (Option d)
Answer 3 Performing in the same way as above
1/Rparallel = (1/20 + 1/36 +1/45) (Kohm)^-1 = 0.05 +0.0278 + 0.0222 =0.1 (Kohm)^-1
Rparallel = 1/0.1 Kohm = 10 Kohm
Now this Rparallel is in series with R1 (7 Kohm), Rtotal = 7 Kohm+10 Kohm = 17 K ohm (option b)