RC Circuits - Engineering

Q1:

When the frequency of the voltage applied to a series RC circuit is increased, the phase angle

A increases

B decreases

C remains the same

D becomes erratic

ANS:B - decreases

- If you want to see it visually you can draw a phasor diagram relationship between Xc and R.
- Decreasing the frequency means your Xc will also decrease.
- Xc now is < than R.
- The angle formed between them will also decrease.