How is AC Current Measured?
The two methods used to measure AC current:
- Using Multimeter: In order to measure AC from multimeter ,connect the multimeter in series with the circuit. Set the multimeter in the approximate range where you expect your current value will lie. Ensure that the power source is turned on and measure the reading given by multimeter. This method is direct method by making connection with current-carrying circuit.
- Utilizing Flux Generated by Circuit : This method employs the use of current transformers which have primary and secondary windings on a magnetic core. The ac current in primary coil generates a magnetic field in the core which induces current in secondary coil. A term ‘step down ratio is defined as the ratio of number of turns in primary and secondary windings. A low level of current is easily detected using certain instrumentation.
Working Principles of Alternating Current Generator
Do you ever wonder what kind of current flows in the power lines of our household? Is it the same current that is generated in electronic devices with DC battery supply or is it something different? In this article, we will discuss a different current that alternates i.e. varies in magnitude and direction. This type of current is called alternating current.
Alternating current is generally seen flowing in power lines(telephone cables, office lines) and normal household electricity that comes from a wall outlet. It is basically used for industrial, chemical, and domestic power usage where it is transmitted over a long distance. The most common frequency for AC power in many parts of the world is 50 or 60 hertz (Hz), meaning the direction of the current changes 50 or 60 times per second. On the contrary, we have DC current which flows in one direction and doesn’t change polarity.
In this article, we will see all the terminologies related to AC current, the method used for generating AC current, and the difference between AC and DC current. We will also discuss the phasors and the application of AC currents. The later part of this article will talk about AC circuit analysis.