# Transformer in Non-inertial frame

• I
In this example I'd like to know about the output of the transformer. What happens if an electromagnetic transformer is powered by a sine-wave and simultaneously accelerating at non-relativistic speeds?

I assume the output will still be a sine-wave but the frequency will change. Is this correct?

## Answers and Replies

Nugatory
Mentor
What happens if an electromagnetic transformer is powered by a sine-wave....
What is the source of this sine wave and what frame are you using when you specify its frequency?
I assume ... the frequency will change.
Because frequencies are always frame-dependent, it is never sufficient to speak of the frequency of something without also specifying the frame you're using. Chances are that when you say "the frequency" you mean either "the frequency using an inertial frame in which the transformer is momentarily at rest" or "the frequency using the non-inertial frame in which the transformer is always at rest".... but you'll have to tell us which it is.

Samson4
Dale
Mentor
2021 Award
Acceleration isn’t part of circuit theory.

This would be a hard problem to solve with Maxwell’s equations outside of a dedicated numerical solver.

Samson4
What happens if an electromagnetic transformer is powered by a sine-wave and simultaneously accelerating at non-relativistic speeds?
Nothing. The equipment to which the transformer is connected is usually at rest with respect to the transformer.

Nothing. The equipment to which the transformer is connected is usually at rest with respect to the transformer.

A more specific and detailed scenario; the transformer and generator are placed on a play-swing and the ouput is connected to an oscilloscope placed directly in the center of the swing's trajectory. There are leads that connect the output to the scope. The oscilloscope will see a frequency modulated sine-wave?

Dale
Mentor
2021 Award
A more specific and detailed scenario; the transformer and generator are placed on a play-swing and the ouput is connected to an oscilloscope placed directly in the center of the swing's trajectory. There are leads that connect the output to the scope. The oscilloscope will see a frequency modulated sine-wave?
I think that you will need to get a dedicated numerical solver to determine this.

Samson4
A more specific and detailed scenario; the transformer and generator are placed on a play-swing and the ouput is connected to an oscilloscope placed directly in the center of the swing's trajectory. There are leads that connect the output to the scope. The oscilloscope will see a frequency modulated sine-wave?

A transformer is a passive component, like a resistor. Neither can change the frequency of the signal going trough them.

A diode is an active component, it can generate frequencies, by distorting the input signal. A generator is very likely an active component - it generates an output signal, while the input signal does not exist - or something like that.

I suggest that instead of a generator we use an oscillator made of a capacitor and an inductor. We put the oscillator on a swing, and we can connect the oscillator to a transformer too - I just don't see any point in that because the frequency does not change.

I got my information about passive and active components from here:
https://electronics.stackexchange.c...tiation-between-passive-and-active-components

Samson4