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# If each resistor in the circuit shown is 5.0 Ω and the battery is 12.0 V, what does the second voltmeter (V2) read?

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If each resistor in the circuit shown is 5.0 Ω and the battery is 12.0 V, what does the second voltmeter (V2) read?

0.35 V

0.96 V

2.4 V

4.8 V

4.8 i think ?

Apr 22, 2020

#1
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We already determined the current through the circuit (in a previous question)

I R4 = Voltage         R4 = 5 ohms    and current was from previous Q

Apr 22, 2020
#2
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ops im sorry i submitted the wrong one!

jjennylove  Apr 22, 2020
#3
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For this circuit, what will be the voltage drop across R3 ?

21.3 V

14.2 V

45.0 V

9.47 V

i meant this one

jjennylove  Apr 22, 2020
#4
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it would be 45.0 right?

jjennylove  Apr 22, 2020
#5
+25994
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NO.......

Current in the circuit      v/r = i

45/(20+30+45) = 473 mA

Votage across  R3   =  IR =  .473 * 45 = 21.3 v

ALL of the voltage will be dropped around the circuit .....45 v will be dropped

R3  portion will be a fraction     45 / (20+30+45)    x 45 v = 21.3 v

Apr 22, 2020
#6
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im so sorry, i dont know why i cant seem to understand these! it makes sense what you have wrote, i jsut hope i can apply to the others! thank you

jjennylove  Apr 22, 2020