Clive W. Humphris

**AC MEASUREMENTS: RMS Voltage. **

The sine wave is the accepted way of representing an alternating voltage or current. Its wave shape is derived from the output of a voltage generator during one complete revolution using a single loop of wire. Amplitudes may be measured as Peak, Peak-to-Peak and RMS (root-mean-square).

RMS values are considered to have the equivalent energy content (heating effect) as comparable DC voltages and currents. 250V AC mains has an RMS value with a peak voltage of approximately 350V and a Peak-to-Peak value of 700V.

Unless otherwise stated AC voltage and current measurements are taken to be RMS values. Applying the appropriate formula easily makes the conversion.

- Table of Contents
- Interactive eTextbooks
- Basic Electronics
- Conductor And Insulator
- Resistor Value Test
- Simple Dc Circuits
- Types Of Switching
- Variable Voltages
- Ohm's Law
- DC Voltage
- DC Current
- Series and Parallel Resistors
- AC Measurement
- AC Voltage and Current
- AC Theory
- RCL Series
- RCL Parallel
- Capacitance
- Capacitors
- Inductance
- Inductors
- Impedance
- Radio and Communication
- Tuned Circuits
- Attenuators
- Passive Filters
- Active Filters
- Oscillators
- Circuit Theorems
- Complex Numbers
- DC Power
- AC Power
- Silicon Controlled Rectifier
- Power Supply
- Voltage Regulation
- Electro-Magnetism
- Electrical Machines
- Transformers
- Three Phase Systems
- Energy Transfer and Cost
- Atomic Structures
- Diode Theory
- Diode Applications
- Transistor Theory
- Bipolar Transistors
- Transistor Configurations
- Active Transistor Circuits
- Field Effect Transistors
- Basic Operational Amplifier
- Op-Amp Theory
- Op-Amp Applications
- Sum and Difference Amplifiers
- Analogue Multi-Meter
- Component Testing