I figured out 7, but I was unable to figure out 8. Thanks! In the section of cir
ID: 1581075 • Letter: I
Question
I figured out 7, but I was unable to figure out 8. Thanks!
In the section of circuit below R,-4 473 Ohn. R2-0 940 Ohn. and the voltage difference yrb-2 500 V The current310 A Find the value of Rp. H3 Hint: The total resistaace betwee bbcalulate by hrs law sve bthunt ad volue itliercesarkonzI (Does thst help? Sunce Ri ad R2 are ive, I clan R3can be caleulated now) s. [1pt] What the cutrent though R Answer- Not yet correct, tries 46 Submit A Ilint: If only Iknew' the voltage across R2. I could findl the current through it via Ohm's law. rigat? ln.. .can I first figure out the voltage drop across RI? (l thirk so, since I know che current throngh in) And if I know thsr, AND the toeal rolrage difference from a no b, daessr tir help me quickly fizure out the voltaze drop across R2...Explanation / Answer
7.
V1 = Voltage across the resistor R1 = i R1 = 0.510 x 4.473 = 2.3 Volts
Since R2 and R3 are in parallel , they have same Voltage across them
V2 = Voltage across the resistor R2 = V3 = Voltage across resistor R3 = (Va - Vb) - V1 = 2.5 - 2.3 = 0.2 Volts
current in R2 = i2 = V2/R2 = 0.2 /0.94 = 0.213 A
we know that
i = i2 + i3
0.51 = 0.213 + i3
i3 = 0.297 A
since
i3 = V3/R3
0.297 = 0.2/R3
R3 = 0.67 ohm
8)
current in R2 = i2 = V2/R2 = 0.2 /0.94 = 0.213 A
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