Have you ever needed to power a 12-volt relay in a circuit but only had 6 or 9 volts available? This simple circuit will solve that problem. It allows 12-volt relays to be operated from 6 or 9 volts, ...

The current flowing in a parallel circuit can be investigated by connecting the circuit below. Once more, put one ammeter in position A 1 and record the reading in a suitable table. The current in a ...

You can investigate current flowing in a series circuit by connecting the following circuit. Put one ammeter in position A 1 and record the reading in a suitable table. Then move the ammeter to ...