An ammeter with a full scale deflection for I = 10.0 A has an internal resistance of 24 Ω. We need to use this ammeter to measure currents up to 12.0 A. The lab instructor advises that we get a resistor and use it to protect the ammeter.
(a) What size resistor do we need and how should it be connected to the ammeter, in series or in parallel?
(b) How do we interpret the ammeter readings?