What device is used to decrease circuit loading when using an oscilloscope?

The use of a 10:1 divider probe with an oscilloscope is essential for reducing the circuit loading. When an oscilloscope is connected to a circuit to observe signals, it presents a certain input impedance to that circuit. Connecting an oscilloscope directly can affect the circuit's operation if the input impedance is low relative to the circuit impedance, potentially altering the behavior of the signal being measured.

A 10:1 divider probe increases the input impedance seen by the circuit while providing a lower loading effect. It achieves this by effectively dividing the voltage down, allowing the oscilloscope to measure the signal without significantly affecting the circuit being tested. This is particularly useful in sensitive applications where precise measurements are required, as it allows for accurate signal monitoring without introducing distortion or invalidating the measurements due to circuit loading effects.

The other options do not serve the purpose of reducing circuit loading when using an oscilloscope. A signal generator is typically used to generate test signals for diagnostics. A voltage regulator is used to maintain a constant voltage level, and a current clamp is designed for measuring current without interrupting the circuit, which does not address the loading issue related to voltage measurement with an oscilloscope.