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Calculating current in circuit

 
 
Reply Sat 9 Nov, 2019 02:44 am
Hey guys, does anyone know to calculate the current for resistors R2 and R3? Given that the total current flowing between the two resistors is 900 mA. How do I find out the current in each one?
https://imgshare.io/image/20191108-232933.xYFUy
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Type: Question • Score: 1 • Views: 448 • Replies: 4
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fresco
 
  1  
Reply Sat 9 Nov, 2019 04:10 am
@Moelmoyti,
The voltage is the same for all parallel resistors.

Use Ohms Law for the network where V =I xR .....
I is given
and the combined resistance R is found by 1/R =1/R1+1/R2+1/R3

Once you get V, apply Ohms Law using that V, to each single resistor
e.g, e.g. V=I1xR1
Moelmoyti
 
  1  
Reply Sat 9 Nov, 2019 06:25 am
@fresco,
Still I can't figure out how to calculate exactly what I3 equals. I know it's divided between I2 and adds up to 900mA but how do I calculate it
Thanks Smile
fresco
 
  1  
Reply Sat 9 Nov, 2019 06:52 am
@Moelmoyti,
V= VT = V3

R2 and R3 are in parallel with respect to 900ma.....not R1 as suggested in my first answer.

So V=.009 x R2R3/(R2+R3)

I3 =V/R3
Moelmoyti
 
  1  
Reply Sat 9 Nov, 2019 07:08 am
@fresco,
Thank you man
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