The voltage required to drive the domains along the racetrack would be proportional to the length of the wire.

Batteries provided the voltages required by tubes in early radio sets.

The voltage required to charge the cells is between 1.45 and 1.65 volts.

One of these is simply to reduce the 240 volt mains supply down to the much lower voltage required by the circuit.

As the gap was reduced further, the voltage required to cause an arc began to rise and again exceeded its original value.

The 100-volt-plus voltages required by magic eyes are not present in modern devices, so the magic eye is now obsolete.

Next, we'll learn about the coil that generates the high voltages required to create a spark.

There are developments that use an ion gel to improve manufacturing and reduce the voltage required.

The voltage required may range from 4,000 up to 13,200 volts.

The voltage required was usually 5 or 6 volts AC.