It lies in the internal resistance. When you hook a moving-coil meter into a circuit, you are doing work, drawing energy from the circuit being measured to move that pointer. Imagine the meter ...

The world’s largest moving coil meter – about 17 feet square – will overlook the Tenth Electrical Engineers Exhibition to be held from March 21 to 25 at Earls Court. So, 63 years ago started a story ...

A staple of the radio amateur’s arsenal of test equipment in previous decades was the dip meter. This was a variable frequency oscillator whose coil would be placed near the circuit to be tested ...