The range of a DC ammeter can easily be extended by:

An ammeter measures current flowing through a circuit, so the internal meter movement must pass some of that current. However, the basic meter movement can only handle a very small amount of current before being damaged. To extend its range to measure higher currents, a precise resistor known as a "shunt" is placed in parallel with the meter's internal resistance. This allows the majority of the current to bypass the delicate meter movement, while a known, proportional fraction flows through the meter to give a reading. Connecting a resistor in series would limit the overall current in the circuit and effectively convert the meter into a voltmeter, while changing inductance or capacitance has no bearing on DC current measurements.