How does the internal circuitry differ among the ohmmeter, voltmeter, and ammeter?

Which subatomic particle has a negative charge

Two positive charges are equal. which has more electric potential energy?

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 3.00 ms . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?