anonymous
  • anonymous
If each resistor in the circuit drawn inside is 5.0 Ω and the battery is 12.0 V, what does the second voltmeter (V_2) read? A. 0.96 V B. 0.35 V C. 4.8 V D. 2.4 V
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
|dw:1433867393099:dw|
anonymous
  • anonymous
i think it got cut off, but that last part just is labeled R3!
Michele_Laino
  • Michele_Laino
we have to compute the equivalent resistance, frst

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Michele_Laino
  • Michele_Laino
|dw:1433867505494:dw|
Michele_Laino
  • Michele_Laino
so equivalent resistance is: R_eq= 5+2.5+5=...
anonymous
  • anonymous
12.5!
Michele_Laino
  • Michele_Laino
ok!
Michele_Laino
  • Michele_Laino
now the current through R_4, which is the current of the circuit, is: I=V/R_eq= 12/2.5=...
anonymous
  • anonymous
we get 4.8! so does that mean choice C is our solution?
Michele_Laino
  • Michele_Laino
no, since we have to compute the voltage drop across R_4, which is: V_2=4.8*5=...volts
anonymous
  • anonymous
ohh and then we get 24!
anonymous
  • anonymous
what happens next?
Michele_Laino
  • Michele_Laino
sorry, the current is: 12/12.5=...amperes
anonymous
  • anonymous
0.96? so choice A is our solution?
Michele_Laino
  • Michele_Laino
ok! now the requested volatge drop is: 0.96*5=...volts
anonymous
  • anonymous
4.8! so it is choice C?
Michele_Laino
  • Michele_Laino
yes!
anonymous
  • anonymous
yay!! thanks!! :) onto the next! :P
Michele_Laino
  • Michele_Laino
ok! :)

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