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It's a coil I got out of a stereo amplifier. It's wound on what looks like a toroid. I was using a sine wave 5V PP. I was measuring the voltage on an oscilloscope.
Thanks again for the help.
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Thanks for the link. From what I understan, past a certain frequency, impedance...
I have a question that came up during an experiment. I hooked up a function generator to a coil and to my surprise the voltage across it went from 4.48 volts at 100 kHz to 800mV at 1 mHz then back up to 4.04 volts at 4.9 mHz. I thought as the frequency went up current went down in an inductor...
I'm trying to figure out why when I measure current on my FLUKE 289 meter it reads .536 on the mA scale and 276 on the uA scale when I apply .52v from a power supply through a resistor. I assume the difference internal resistance. Can anyone confirm?
Thanks
PV
Having a bit of trouble with this question: "A storage battery of emf 34 V and internal resistance of 0.1 ohm is to be charged at a rate of 20 A from a source of 110 volts. What series resistance is needed in the circuit?"
How do you solve this. The text book I am using doesn't explain this...
Hi there just joined today, I was looking at the diagram of a direct conversion receiver wondering why you need an oscillator. If it oscillates at the exact same frequency as the input signal wouldn't tuner be sufficient? I can understand in a superheterodyne receiver as you need to change the...
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