Ammeters measure the intensity of charge (electrons) flow per second, known as electric current = . a) Why do the embedded ammeters show zeroth readings even though there is a potential difference in the battery? b) Why must ammeters be inserted in the circuit flow, not "outside" as voltmeters? 3. Consider the following possible ways of measuring the potential difference. A. B. a) Explain why the voltmeters show different readings on each diagram even though the current does not flow. Check this using the sim. b) What is the potential difference between the terminals of the ammeter? Check this prediction using the sim. c) Voltmeter and ammeter have different designs. o An ammeter must have almost zeroth internal resistance. Explain why. o A voltmeter must have a very high internal resistance. Explain why