27. Resistors & DC Circuits
Resistors and Ohm's Law
27. Resistors & DC Circuits Resistors and Ohm's Law
12PRACTICE PROBLEM
An unknown long straight cylindrical metallic wire is connected to a 3.0 V battery. The wire has a radius of 3.0 mm and a length of 4.0 m. Using a Tesla meter, the magnetic field at a distance of 4.0 mm from the surface of the wire is measured to be 34 mT. Determine the resistivity of the wire.
An unknown long straight cylindrical metallic wire is connected to a 3.0 V battery. The wire has a radius of 3.0 mm and a length of 4.0 m. Using a Tesla meter, the magnetic field at a distance of 4.0 mm from the surface of the wire is measured to be 34 mT. Determine the resistivity of the wire.