Number 3 Please R LON-CAPA The Learning x NC Number 2 Please l Cheg x ded/mcgilV

Question

Number 3 Please

R LON-CAPA The Learning x NC Number 2 Please l Cheg x ded/mcgilV402004209695.458bamcgill2/defi 48657 6066page 13.10V t: How is power related to current and voltage? Also, remember, Ri is the resistor dissipating 1.0 W not the whole system! Submit Answer Incorect Tries 1/6 Incs Due in 19 hours, 25 minutes problem 3 In the section of circuit below, R 3.769 Q, R: 230 Q. and the voltage difference Va-Va 3.70 V The current i 0.250 A a Find the value of R 844ohm The total resistance between a and b can be calculated by Ohm'slaw since both current and voltage differences are known. Since R1 and R2 are given. R3 can be calculated Submit Answer Incorrect Tries 1/6 Breious Incs b What is the eurent through R3? 371A Calculate the effectwe resistance of the two resistors un parallel. Calculate the voltage drop across the two parallel resistors using the effective resistance in series with R1 and rememberung that the current is the same in all components of a series circuit. Knowing the voltage across R3 and the resistance of R3 fiom problem A calculate the current in R3 Submit Answer Incorrect Tries i 6 Previous Tries Due in 19 hours, 25 minutes Problem 4 ENG A

Explanation / Answer

R1 = 13.769 ohms , R2 = 1.23 ohms , V = 3.7 V, I = 0.26 A

R123 = V/I = 3.7/0.26 = 14.23 ohms

R23 =(1.23*R3)/(1.23+R3)

R123 = 13.769+ (1.23*R3)/(1.23+R3) = 14.23

R3 = 0.737 ohms

In series combination current is constant

I23 = 0.26 A,

R23 = (1.23*0.737)/(1.23+0.737) = 0.461 ohms

V23 = 0.26*0.461 = 0.12 V

In parallel combination potential is constant

V2 = V3 = 0.12 V

I3 = 0.12/0.737 = 0.163 A

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