The Ammeter Your Physics Instructor Uses for In-Class Demonstrations Has $\varOmega$

Multiple Choice

The ammeter your physics instructor uses for in-class demonstrations has a resistance R_g = 60 $\varOmega$ and requires a current of 1.0 mA for full-scale deflection.The same ammeter can be used to measure currents of much greater values by wiring a shunt resistor of relatively small resistance,R_p ,in parallel with the ammeter.The value of the shunt resistance that allows the ammeter to be used to measure a current of 12 A at full-scale deflection is

A) 5.0 m $\varOmega$ .
B) 4.0 m $\varOmega$ .
C) 3.5 m $\varOmega$ .
D) 2.5 m $\varOmega$ .
E) 1.7 m $\varOmega$ .