The phase shift in each RC combination of the RC phase shift oscillator isa.0 or 360 degreeb.180 degreec.60 degreed.45 degree

The phase shift in each RC combination of the RC phase shift oscillator is 60 degrees. So, the correct answer is c. 60 degree.

Here's why:

An RC phase shift oscillator consists of a common amplifier and a phase shift network. The phase shift network consists of three RC sections. The output of the last RC section is fed to the amplifier. The phase shift network provides a phase shift of 180 degrees, and the common amplifier provides another 180 degrees of phase shift.

The total phase shift around the loop is 360 degrees or 0 degrees, which is the condition for oscillations.

Since the phase shift network is made up of three identical RC sections, each RC section contributes an equal amount of phase shift. Therefore, the phase shift in each RC combination is 180 degrees / 3 = 60 degrees.