What functions can a multimeter test for?

A multimeter is a versatile tool that is designed to measure several electrical properties, particularly voltage, current, and resistance. Understanding these functions is essential for electricians and technicians in diagnosing and troubleshooting electrical systems.

Voltage measurement allows you to determine the potential difference between two points in an electrical circuit, which is critical for ensuring that equipment is operating within its specified voltage limits. Current measurement helps you understand how much electricity is flowing through a circuit, which is vital for preventing overloads. Resistance measurement is crucial for checking the integrity of components, ensuring they function correctly without creating shorts or open circuits.

The other options list functions that a multimeter might not directly cover. While options A and C include aspects of electrical measurements, they introduce concepts such as inductance and frequency, which are typically outside the primary function of a standard multimeter without additional settings or modes. Option D discusses concepts like impedance and reactance, which are more advanced measurements often associated with alternating current (AC) circuits, not the basic capabilities expected from a multimeter.

Therefore, focusing on voltage, current, and resistance captures the fundamental capabilities of a multimeter, which are crucial for everyday electrical diagnostics and maintenance tasks.