What method can be used to amplify a low amperage reading with a clamp-on amp meter?

Using a clamp-on amp meter to amplify a low amperage reading involves leveraging the principle of measuring current in a more effective manner. When you wrap the wire around the clamp of the amp meter, you effectively increase the number of turns through which the magnetic field is detected. This can enhance the reading, as the current sensed by the meter is proportional to the number of wire turns around the sensing core.

This method is particularly useful when you are dealing with lower currents, as the single pass of current through the clamp may produce a reading that is below the meter's detectable range. By wrapping the wire multiple times, the amp meter multiplies the measured current by the number of loops, allowing for a more accurate and higher reading.

The other options do not provide a practical solution for improving low amperage readings. Increasing the voltage supplied could risk damaging the circuit or create unsafe conditions. Using a higher-rated amp meter might not necessarily solve the issue of accurately reading low currents, as the sensitivity range of the meter is what matters most. Changing the wire insulation does not affect the current measurement itself; it merely alters the physical characteristics of the wire but does nothing to amplify the current reading.