An Ac Generator Consisting of a Coil With $N$ Turns Rotating at Angular Speed

question 72

Multiple Choice

An ac generator consisting of a coil with $N$ turns rotating at angular speed $\omega$ in an external magnetic field $B$ produces a maximum emf $\varepsilon _ { 0 }$ . If you now decrease the number of turns in the coil to $N / 2$ and at the same time cause it to rotate twice as fast, what will be the new maximum emf if you do not change any of the other quantities?

• A) \(4 \varepsilon _ { 0 }\)
• B) \(\varepsilon _ { 0 } / 4\)
• C) \(\varepsilon _ { 0 }\)
• D) \(2 \varepsilon _ { 0 }\)
• E) \(\varepsilon _ { 0 } / 2\)

---

Definitions:

ATA Standard

The ATA Standard refers to a set of specifications and practices developed by the Air Transport Association (now Airlines for America, A4A) for the design and maintenance of aircraft.

Trailer Cord

A multi-wire electrical cable used to connect a trailer's lighting and electrical systems to the towing vehicle, ensuring synchronization of signals.

Brake Lights

Safety features on vehicles that illuminate to signal to other drivers that the vehicle is decelerating or coming to a stop.

Visible Light

The portion of the electromagnetic spectrum that is visible to the human eye, typically spanning wavelengths from about 380 to 750 nanometers.