27. Resistors & DC Circuits
Resistors and Ohm's Law
27. Resistors & DC Circuits Resistors and Ohm's Law
16PRACTICE PROBLEM
In an electric circuit, a gold wire with a radius of 20 μm is used to precisely carry a current of 200 mA when connected to a 3.8 V power supply. Determine the length of wire needed to meet this condition. The resistivity of gold is approximately 2.4 x 10 -8 Ω•m.
In an electric circuit, a gold wire with a radius of 20 μm is used to precisely carry a current of 200 mA when connected to a 3.8 V power supply. Determine the length of wire needed to meet this condition. The resistivity of gold is approximately 2.4 x 10 -8 Ω•m.