Loading Effect of Voltmeter

loading-effects-of-voltmeter

Loading effect of the voltmeter is the difference between actual voltage that exists in the circuit without connecting the voltmeter and the voltage that appears after connecting voltmeter. A voltmeter is placed across a resistor to measure its voltage. When a voltmeter connects across any resistance its internal resistance impacts the overall resistance of the … Read more

Loading Effects of Ammeter

loading-effects-of-ammeter

Loading effect of electrical instruments is the difference between the actual value and the value that is being measured by the instrument. An ammeter is a low internal resistance instrument which connects in series to the circuit under test. If ammeter connects in series to the instrument whose resistance is nearly or closely equal to … Read more

Reciprocity Theorem

reciprocity-theorem

Reciprocity theorem is a basic theorem that can be used on circuits containing only single source. Reciprocity theorem can be applied to a circuit containing either a voltage or a current source. In the case of Voltage Source A voltage source causing some current (Let’s assume I) in a certain branch of circuit can be … Read more

Current Transformer Basics Handbook [PDF by Digital Library]

current-transformer-handbook

A current transformer is an instrumentation transformer that is used for protection and measurement purposes in electrical power systems. Current transformer basics Handbook by Digital Library of Electrical and Electronics Engineering. List of topics in this book: The basic working of CT Schematic diagram of its working How does it look The industry standard of … Read more

Basic Electrical Formulas Handbook

basic-electrical-formulas-handbook

Basic Electrical Formulas Handbook by Digital Library of Electrical and Electronics Engineering is a combination of some of the most widely used basic electrical formulas. Entire list contains: Ohm’s law formula Resistors in series Resistors in parallel Capacitors in series Capacitors in parallel Inductors in series Inductors in parallel Current divider formula Voltage divider formula … Read more