Center tap transformer. Voltages 180 out of phase but what about direction of current in 2 parts?
In the center tap transformer ... volages in two parts in secondary coil would be 180° out of phase.

Yes, but only because you have set the GND reference on the centre-tap.



simulate this circuit &ndash; Schematic created using CircuitLab
Figure 1.

I want to understand the direction of current in both the parts. Will the direction of current in Part 11 would be same as Part 1?


The voltages are actually in-phase as shown in Figure 1.
In both circuits the current is flowing clockwise.
If V1 = V2 and R1 = R2 then I1 = I2 and the current in the centre-tap = 0.




simulate this circuit
Figure 2. (a) It may be clearer how V1 and V2 are in phase if we use the bottom tap as our GND reference. (b) Even if we use the top tap as GND reference it doesn't change the voltage or currents.

Figure 3. Voltages at one instant (90°) on the original sketch.

Note that V1 is positive. That means the voltage at the top of R1 (1) is higher than at the bottom (3).
Note that V2 is negative. This means the voltage at the top of R2 (3) is higher than at the bottom (2).
Both voltages are in the same direction. They are in phase.
It's only when you change your reference point to the centre-tap that they appear out of phase.