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How to obtain a high-current AC power source with adjustable frequency?

Physics Asked by Teresa on December 6, 2020

I’m trying to investigate how the frequency of the alternating current in the solenoid affects the ring motion for a Thomson Jumping Ring apparatus. I have a variable frequency AC power source that outputs a peak voltage of 20V, which is not enough to power my experiment, especially since the power source has an internal resistance of 50 ohms, which means that the current passing through the solenoid won’t be very high. Is there a way I could increase the output current?

I was also considering using a higher voltage AC power source, like a VARIAC or just line voltage, but I haven’t found a way to alter the frequency for these. I tried to get a variable frequency drive but there were none available with a single-phase output.

Any ideas or advice would be very much appreciated.

One Answer

How about feeding your AC signal to an audio amplifier and then a step up transformer (that could be a step down transformer run backward).

Answered by R.W. Bird on December 6, 2020

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