Which tool is used to test electrical current within a source of power, like a power supply?

Cable tester

Cable striper

Crimper

Multimeter

Multimeter

Explanation:

A multimeter or multitester or VOM (volt-ohm-milliammeter), is a tool to measure electricity and this tool has some function to measure voltage, current, and resistance. We could find analog and digital multimeters, and we can find expensive certificates and professionals multimeters ($5,000) or cheap ($10).