A Galvanoscope is a popularly used laboratory device/instrument for detecting electric currents, indicated by the deflection of a magnetic needle. This instrument shows the presence of current and its magnitude. The instrument is especially used to detect and measure feeble currents.

A simple galvanoscope consists of a single turn of wire to create a magnetic field which in turn moves the magnetic needle. The instrument can be made more sensitive by increasing the number of turns of wire in the loop surrounding the needle.

Use of Galvanoscope
The instrument has application in fields including:

• Educational laboratories
• Electrical equipment