which defines the relationship between current, voltage, and resistance. If we know two out of the three, we can calculate the unknown. This is the underlying principle behind the current shunt.

You need to know how to measure the current that flows through a component in a circuit and the voltage across it. The ammeter must be connected in series with the component – remember ...

We can calculate the voltage across the thermistor under these conditions. First find the total resistance of the voltage divider. If the thermistor is moved to a freezer its resistance rises to ...

In his latest Workbench, John Bisset shares with us reader insight into how beneficial clear and legible labels are on power ...

Scientists at Osaka University have designed a nanogate that opens and closes using electrical signals, offering precise ...

A collaboration led by researchers at Osaka University has developed a nanogate that can be open or shut by applying ...

In his video [Afroman] describes how the LM317 can be used to regulate current rather than voltage to provide a constant current source under varying load. This can useful for a number of ...

Laura is an assistant editor for The Scientist. She earned her PhD in biomedical sciences from Rush University by studying how circadian rhythms and alcohol affect the gut.