# [beginner question] Calculate currents in simple circuit (Ohm's law)

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Joined: Apr 04, 2019

Replies: 0
[beginner question] Calculate currents in simple circuit (Ohm's law)
April 4, 2019 - 3:28pm

Hi,

how to calculate I1, I2, I3, I4 in this circuit?

R1 = 500 Ohms
R2 = 600 Ohms
R3 = 4000 Ohms
R4 = 200 Ohms

U2 = 2,5V
U4 = 0,1V  Offline

Joined: Aug 27, 2018

Replies: 19
Nodal / mesh analysis
April 4, 2019 - 8:38pm

The circuit is pretty simple. And looks more like a homework question. So instead of giving you direct answer, I would rather guide you on it.
Resistor R3 and R4 are in series so combine them to its equivalent resistor and assume the current through it to be Iq, then Iq = I3 = I4. From the there the circuit will be very simple. You can use nodal analysis or mesh analysis to solve for voltage drop and current values. You can use the following two links to know hoe to use nodal or mesh analysis works
https://circuitdigest.com/tutorial/nodal-voltage-analysis
https://circuitdigest.com/tutorial/mesh-current-analysis