iew History Bookmarks Window Help a blackboard.und.edu ?? Take Test: Chapter 28H

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iew History Bookmarks Window Help a blackboard.und.edu ?? Take Test: Chapter 28H d/(dy)(yexy) s Question Completion Status 1 paints Saved QUESTION2 The next few problems will show you how to find the voltage that will result in a certain power delivered to a single resistor in the circuit. a. In the diagram below, wh that this only depends on the single resistor and is independent of the rest of the circuit. at minimum current would result in 20W of power delivered to the left resistor? Notice 100 2 100? 100 ? 44721359 1 points QUESTION3 b. What is the equivalent resistance of the three resistors? 150 1 points QUESTION 4 c. What potential difference applied to points a and b would result in the current found in part a? SSave ane Sutome Click Save and Submit to save and submit. Click Save All Answers to save all answers 4.

Explanation / Answer

(2)power=(current^2)*resistance

power=20W

resistance =100ohm

so current=0.447 A

but this current will be in both branches of parallely connected resisters and this value is same for them bcz both are equal so net cueent in first resister will be =0.447+0.447=0.89 A

(3)for parallel resisters equivalent resistance will be =(100)(100)/100+100=50 ohm

this resister is in series connection with first 100 ohm resister so equivalent resistance of the circuit is =100+50

150 ohm

(5)since V=RI

so V=150*0.89

=133.5 volt

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