Most places you live in today will manage their electrical power via circuit breakers, though fuse boxes predated that ...

Save guides, add subjects and pick up where you left off with your BBC account. Resistance ® close resistance (R)How difficult it is for current to flow. increases when components, for example a ...

Here’s a simple piece of equipment which you’ll be proud to display on your electronics bench. It’s a resistance decade box. The concept has been around forever — it offers … ...

They do this by changing the length of some resistance wire in a circuit. The circuit diagram below shows a variable resistor being used to control the current through a bulb.

One of those useful things to have around on your bench is a decade resistance box, essentially a dial-a-resistance instrument. They used to be quite expensive in line with the cost of close-tolera… ...