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A multimeter is:
A versatile instrument used to measure various electrical properties such as amps (current), volts(voltage), and ohms(resistance)
One key component of a multimeter is:
The ammeter
What does an ammeter do?
Measure the inline current(amps) flowing through a circuit
What other devices are either outdated or nonexistent, making the multimeter the most accurate and reliable choice for measuring current?
Tri gauge, amp gauge, and currentometer