Chris Brown

Physics Question about Parallel Resistance!?

Tom has a sensitive ammeter that requires only 1.000mA of current to provide a full-scale reading. The resistance of the ammeter coil is 500.0 ohms. He wants to use the meter for a physics experiment that requires an ammeter capable of reading to 1.000 A. He has calculated that an equivalent resistance of .5000 ohms will produce the necessary voltage drop of .5000 V (V=IR=1.000 x 10 ^-3 x 500 ohms), so that only 1.000mA of current passes through the meter. What value of shunt resistor, a resistor placed in parallel with the meter, is needed?