Art of the Problem | Galvanometer @ArtOfTheProblem | Uploaded 11 years ago | Updated 11 hours ago
A coil of wire increases (multiplies) the strength of the magnetic field. In this case the field is pointing directly through the loop, which is why the needle is being held in position when the battery is attached. This instrument was an early method of measuring the strength of a battery.
A coil of wire increases (multiplies) the strength of the magnetic field. In this case the field is pointing directly through the loop, which is why the needle is being held in position when the battery is attached. This instrument was an early method of measuring the strength of a battery.