The system shown in fig(a) satisfies the relation between the current IL and the voltage VL as described in fig(b).
Assume the source voltage Vs = 12 V and the value of resistance R2 is the geometric mean of resistance R1 and R3.
The value of R3 is ______ (in Ω)
fig(a): Circuit
fig(b): Voltage current characteristics
Enter numerical value using the virtual keypad. Round off where necessary.