FITCHBURG — Unitil replaced a 10,000-pound electrical transformer in front of City Hall Wednesday. The transformer had sat under the sidewalk since 1985, said electric line supervisor Mark Frappier, ...

If you’ve ever wondered why something like a radio or a TV could command a hefty fraction of a family’s yearly income back in the day, a likely culprit is the collection of power transformers needed ...

Calculate the ac power delivered to the 8-Ω speaker for the circuit shown above. The circuit component values result in a dc base current of 6 mA, and the input signal (Vi) results in a peak base ...