https://www.allaboutcircuits.com/textbook/alternating-current/chpt-1/what-is-alternating-current-ac/

less turns -> fewer turns

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-1/ac-waveforms/

These musical designations have the wrong subscripts. It should be A_3 through C_5. See https://en.wikipedia.org/wiki/Scientific_pitch_notation

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-1/principles-of-radio/

"How is electricity and magnetism related to each other?" -> "How are electricity and magnetism related to each other?"

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-2/more-on-ac-polarity/

"Conventional battery polarity" diagram has the plus and minus signs in the wrong places.

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-3/inductor-quirks/

"unless its superconducting wire" -> "unless it's superconducting wire"

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-4/series-resistor-capacitor-circuits/

In the filled-out boxes, 68.623 should be 68.623m for clarity.

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-4/parallel-resistor-capacitor-circuits/

Should have a completely filled out box just to bring students all the way through. Should be total Z of 4.9135 angle -10.675 degree, aka 4.8285 - j0.9102

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-5/review-of-r-x-and-z/

Second diagram: nit -> not

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-5/series-parallel-r-l-and-c/

In the first table, the column headings should be C_1, L, C_2, and R

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-6/electric-pendulum/

There's an extra diagram in here that doesn't belong (duplication of the first one).

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-6/q-and-bandwidth-resonant-circuit/

minumum -> minimum

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-9/mutual-inductance-and-basic-operation/

"it is symbolized by the capital letter “M” rather than the letter “L”:" – was there meant to be an equation here? Or an image of the letter M?

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-9/special-transformers-applications/

"If L changes in inductance, ZL will correspondingly change, thus changing the circuit current." ZL should be subscripted: Z_L

"Out of phase DC control windings allow symmetrical of control AC." -> "Out of phase DC control windings allow symmetrical control of AC."

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-9/practical-considerations-transformers/

kVA.kVA. -> kVA.

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-10/single-phase-power-systems/

gage -> gauge

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-10/three-phase-power-systems/

its carrying current -> it's carrying current

SPICE input and output needs to be formatted across multiple lines

each set spaced 120o apart -> each set spaced 120° apart

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-12/ac-voltmeters-ammeters/

Second diagram, the arrows on the bottom of the circuit should be switched: black going left, gray going right.

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-12/ac-instrumentation-transducers/

"can be constructed for limited motion of 360° (full-circle) motion" – a little unclear, seems like "of" might be a typo of "or". So: "can only be constructed for a portion of 360° (full-circle) motion"

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-12/ac-instrumentation-transducers/

The diagram at the beginning of the "Differential Capacitive Transducer Bridge" section appears twice in a row.

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-13/introduction-ac-motors/

Br in "Br due to hysteresis remains" should be B_R (B with a subscripted uppercase R) with a comma following

Same for "-Hc"

"Steinmetz’s Laws of hysteresis" prob should be "Steinmetz’s Law of Hysteresis" or "Steinmetz’s law of hysteresis"

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-13/synchronous-motors/

a few percents -> a few percent

"Though, the synchronous motor is more complex." - should be incorporated into the previous sentence

conversely, use -> and conversely, to use

The AC Motors chapter has a different voice from everything else, is harder to understand, and seems like it was written by someone who knows English well, but is not a native speaker.

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-14/characteristic-impedance/

(Z0) - zero should be subscripted

In last diagram, "impedance" is misspelled and unnecessarily capitalized

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-14/finite-length-transmission-lines/

The first diagram is labeled "Reflected wave." Prob not the best caption?

https://www.allaboutcircuits.com/textbook/alternating-current/chpt-14/long-and-short-transmission-lines/

90o -> 90°