Which device is used to measure electrical current?

Which device is used to measure electrical current?

• A. Voltmeter
• B. Ammeter
• C. Ohmmeter
• D. Transmitter

Answer: (B)

The device specifically designed to measure electrical current is the ammeter. This instrument is connected in series within an electrical circuit to provide an accurate reading of the current flowing through that circuit, typically measured in amperes (A). An ammeter works by creating a very low resistance path for the current to flow through, allowing it to read the amount of current without significantly affecting the overall circuit operation. In contrast, a voltmeter is used to measure the voltage across two points in a circuit and is connected in parallel. An ohmmeter measures resistance and is not directly used for current measurement; instead, it's utilized to determine how much opposition to current flow exists in a component. A transmitter, while relevant in electrical systems, is generally used for sending signals rather than measuring current directly. Therefore, the ammeter is the appropriate choice for directly quantifying electrical current flow.

The device specifically designed to measure electrical current is the ammeter. This instrument is connected in series within an electrical circuit to provide an accurate reading of the current flowing through that circuit, typically measured in amperes (A). An ammeter works by creating a very low resistance path for the current to flow through, allowing it to read the amount of current without significantly affecting the overall circuit operation.

In contrast, a voltmeter is used to measure the voltage across two points in a circuit and is connected in parallel. An ohmmeter measures resistance and is not directly used for current measurement; instead, it's utilized to determine how much opposition to current flow exists in a component. A transmitter, while relevant in electrical systems, is generally used for sending signals rather than measuring current directly. Therefore, the ammeter is the appropriate choice for directly quantifying electrical current flow.