LMS Substation 1st Year Level II Practice Test 2025 – Your Complete Guide to Mastering the Exam!

The device used to measure current flow in a circuit is called an ammeter. An ammeter is specifically designed to provide readings of electric current, which is typically measured in amperes. It is connected in series with the circuit, allowing it to measure the flow of current directly as it passes through the device.

The function of an ammeter is critical in various applications, as it helps identify how much current is running through different components of an electrical circuit. Understanding current flow is essential for troubleshooting issues and ensuring that electrical systems operate within their specified parameters.

While other devices have different purposes, such as a voltmeter, which measures voltage, or an ohmmeter, which measures resistance, an ammeter is uniquely suited for measuring current flow specifically. A galvanometer can also measure current, but it is often used for detecting and measuring small amounts of current rather than for providing precise readings in all scenarios, making the ammeter the more commonly used instrument for this task.