Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/ je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky. Tutorial: Mechanic - electrician Topic: Technical training II. class Passive components – resistors 2 Prepared by: Melichařík Lubomír
Serial and parallel connection of resistors Resistors may be connected (or arranged): - serial (in a row) - parallel (beside each other).
-in serial order the same current flows in all resistors -voltage is distributed to each resistor according to Ohm’s law -total resistance R c is the sum of the individual resistors Rc = R1 + R2 …..+ Rn
-as a symbol of a parallel connection of resistors we use two lines „||“ -for two resistors connected in parallel you can use the simplified relationship:
-to calculate the combination of a serial and parallel connection we will use the two preceding relationships -for example, the total resistance R c of this circuit is given by:
Electrotechnical schematic symbols: Schematic symbol for the NTC thermistor Schematic symbol for the PTC thermistor A thermistor is: -electrical component whose resistance is dependant on temperature: There are two types of thermistors -NTC, known as a negistor – the components resistance decreases with heat -PTC, known as a pozistor- resistance increases with heat.
1. Calculate the resulting resistance of this series of resistors. 2. Calculate the resulting resistance of these resistors connected in parallel.
1. Calculate the resulting resistance of these resistors connected in series and parallel.
Václav MalinaPoznáváme elektroniku I. Adrian Schommers Elektronika tajemství zbavená. ISBN