Charge equation?
Charge (C) = current(A) x time (S)
Potential difference equation
Potential difference (V) = Current (A) x Resistance (Ω)
What is an ammeter?
Measures current (in amps) ammeter must be placed in series
What is a voltmeter?
Measures potential difference in a test wire (in volts)
Placed in parallel around whatever you’re investigating