The properties of Parallel circuit Resistors:
– Potential difference at all resistors are the same for (U)
– Medium large current flowing in each resistor depending on resistance value.
– The number of algebraic branch currents (I1, I2 and I3) equals the total of the current (IT).
– The value of the total resistance or equivalent resistance (RT) of the parallel circuit of three resistors is to be smaller in value than the third smallest value resistor.
Figure 3:31 Parallel resistor circuit
In mathematics can be written as follows:
The current division in parallel circuit
Figure 3.32 shows a parallel circuit of two resistors.
Figure 3.32 The current division in parallel circuit
Current sharing in parallel two resistors in the circuit is determined as follows:
So
Even though :
The flow of each branch:
From the last equation above can be used to determine the branch currents I1 and I2, namely:
