Potential Divider

Chapter 2.3 Potential Divider

Fundamental Electrical and Electronic Principles Third Edition Book
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Fundamental Electrical and Electronic Principles Third Edition Book

  • 40Fundamental Electrical and Electronic Principles Alternatively, 11111R0203063260 1160S so, R6011 5.46 Ans 2.3 Potential Divider When resistors are connected in series the p.d. developed across each resistor will be in direct proportion to its resistance value. This is a useful fact to bear in mind, since it means it is possible to calculate the p.d.s without fi rst having to determine the circuit current. Consider two resistors connected across a 50 V supply as shown in Fig. 2.7 . In order to demonstrate the potential divider effect we will in this case fi rstly calculate circuit current and hence the two p.d.s by applying Ohm’s law: RRRRIERIVIR1211752510050100050575ohmampAvolt..VVVIRV122237 5052512 5...VvoltVAnsAnsIE 50 VR275Ω25ΩR1V1V2 Fig. 2.7