Find the current in the 12 resistor in the figure below. (R1 8.0 , av = 19 V ) 2

Question

Find the current in the 12 resistor in the figure below. (R1 8.0 , av = 19 V ) 2.4 , R2 Need Help? The terminals of a battery are connected across two different resistors in parallel. Which of the following statements are correct? (Select all that apply.) O The voltage difference is greater across the resistor closer to the battery O The voltage difference across each resistor is the same. The larger resistor carries less current than the smaller resistor. The larger resistor carries more current than the smaller resistor O The voltage difference across the larger resistor is greater than the voltage difference across the smaller resistor Need Help?r Find the potential difference across each resistor in the figure below. (R1 = 4.90 , R2 = 3.80 , R3 = 2.60 , R4 = 1.80 ) 250 s

Explanation / Answer

two R2 are in parallel,

R = R2 / 2 = 4 ohm

now R and R1 are in series,

R' = 2.4 + 4 = 6.4 ohm

4 ohm and 12 ohm are in series.

r = (4 x12 )/ (4 + 12) = 3 ohm

now 3 ohm and 2 ohm are in series,

r' = 3 + 2 = 5 ohm

now r' and R' are in parallel,

R" = r' R' / (r' + R') = 2.81 oohm

current through battery = 19 / (2.81 + 2.4)

= 3.65 A

current through r' = 3.65(R') / (R' + r')

= 2.05 A

current through 12 ohm = 2.05 x 4 / (12 + 4)

= 0.512 A

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