# current through series/parallel circuits

Discussion in 'General Electronics Chat' started by sachinembd, Apr 1, 2013.

1. ### sachinembd Thread Starter New Member

Nov 11, 2011
5
0
Hi,
I want to calculate current through circuit shown in attached file.

Actually i want the formula or the way/method to calculate it.
The parallel combination confusing me.

V5,V6 are diode forward voltage drops.

The voltage drops,resistor values used only for easy calculation.

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2. ### Jony130 AAC Fanatic!

Feb 17, 2009
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3. ### ErnieM AAC Fanatic!

Apr 24, 2011
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I would define a current I1 and I2 going thru each parallel branch, and note by inspection that I1 = I2.

Then a simple loop equation will tell everything:

{source V} = {drop 1} + {drop 2} + ... + {drop n}

10V = (I1 * 2ohms - 1V) + (2*I1 * 1ohm)

4. ### sachinembd Thread Starter New Member

Nov 11, 2011
5
0
Below is the simplified circuit in which am suppose to calculate total current.

If we consider diode Vf as 1V and transistor Vce = 0.7V, Vbe = 0.5V for calculation,and the transistor is in ON condition,

how to calculate total current flowing through three loops i.e. through R1,R2,D1,U1,D2,R4 and through R5,R6,U1,D2,R4 and R5,R3,D2,R4 loops.

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