Resistor Power Problems

Problem 1 Calculate the power consumed in an unknown resistor if the applied voltage is 5 V and the measured current is 25 mA. State the value of the unknown resistor and select a suitable power rating. Problem 2 Calculate the power consumed in a 330 Ω...
Power Consumed in a Resistor

Power Consumed in a Resistor

Current flowing through a resistor causes power to be dissipated as heat or thermal energy. For this reason, the maximum power rating of the resistor must not be exceeded or the resistor may overheat – probably causing its destruction. The maximum power which...
Measuring Instruments

Measuring Instruments

Measurement Concepts Accuracy and Resolution Amplitude of AC Waveforms Frequency and Periodic Time Basic Measurement Devices Digital Multimeter Ammeter Voltmeter Ohmmeter AC Circuit Measurements Signal Generator Oscilloscope Frequency Meter Power Systems Wattmeter...
Digital Multimeter

Digital Multimeter

The digital multimeter is the most popular and versatile measuring instrument, offering the combined measurement functionality of an ammeter, voltmeter and ohmmeter, allowing measurement of current, voltage and resistance respectively. The input controls allow...
Resistor Circuits

Resistor Circuits

Single Resistors Ohm’s Law Resistor Types and Symbols Resistor Colour Code Potentiometer Preferred Resistor Series Power Consumed in a Resistor Resistance and Conductance Resistivity and Conductivity Resistor Circuits Resistors in Series Resistors in Parallel...

Series – Parallel Resistor Circuits

The total resistance of a series – parallel resistor combination may be found by repeatedly applying the rules of resistors in series and resistors in parallel until the circuit is simplified to a single equivalent resistor. Typical applications of this method...