Calculate the current i3 in the following configuration

AI Thread Summary
The discussion focuses on calculating the current i3 in a circuit with two batteries and resistors. The provided values include EMF_1 at 6 V, EMF_2 at 3 V, R_1 at 70 Ohm, and R_3 at 20 Ohm. The user initially struggles with applying the formula V=IR due to the presence of two batteries. However, they later indicate that they have resolved the issue and found the solution. The conversation highlights the challenges of circuit analysis involving multiple power sources.
shimizua
Messages
99
Reaction score
0

Homework Statement


Calculate the current i3 in the following configuration:


http://capa-new.colorado.edu/msuphysicslib/Graphics/Gtype57/prob06_kirch.gif
EMF_1 = 6 V
EMF_2 = 3 V
R_1 = 70 Ohm
R_3 = 20 Ohm

Homework Equations


I know that V=IR so I=V/R
but because there are 2 batteries i am just having a little bit of a problem.


The Attempt at a Solution


tried adding up the batteries but it does not seem to be working
 
Physics news on Phys.org
nm, i figured it out
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

FInding current in parallel and series circuits
Replies
10
Views
3K
Did I count this current in a circuit correctly?
Replies
6
Views
1K
Calculating current with and without internal resistance
Replies
6
Views
3K
Kirchoff's Laws Problem Current
Replies
11
Views
2K
Find currents and voltages - 2 batteries & 3 resistors
Replies
3
Views
4K
Batteries, Resistance, Power, Potential, and Current
Replies
3
Views
2K
Calculating Voltage and Current in a Series Circuit
Replies
10
Views
2K
Discharging a capacitor -- Calculate the current as a function of time
Replies
3
Views
2K
Measurement technology textbook problems
Replies
2
Views
484
Calculating Voltage Difference in a Circuit: Am I on the Right Track?
Replies
12
Views
1K

Hot Threads

Recent Insights

Back
Top