Potential Divider 2.0 / 5 based on 1 rating ? PhysicsD.C. ElectricityASAll boards Created by: ChloeGoslingCreated on: 04-01-13 14:26 What is a potential divider? Is a circuit with a voltage source(power supply/battery) and a couple of resistors in series 1 of 8 Why do you use a potential divider? To get a fraction of a source voltage 2 of 8 What do you use a potential divider for? the voltage of the circuit is divided around the circuit. So the voltage is divided into the ratio of the resistors 3 of 8 Example of finding the voltage over 2 resistors in series if you have a 2Ω and 3Ω resistors. You'd get 2/5 of the p.d across the 2Ω resistor and 4/5 of the p.d across the 3Ω resistor. 4 of 8 If there's 2 resistors in series circuit how can you quickly work out how much R1 has of the total resistance? R1/R1+R2 is what R1 has of the total resistance 5 of 8 How do you quickly work out voltage over a resistor if there are 2 resistors in series circuit? Vout = Vs X Rs/R1+R2 (Vout:Voltage out Vs: Voltage supply) 6 of 8 If R1=2Ω R2=3Ω work out what R1 has over the total resistance 2/5 Ω 7 of 8 If R1=2Ω R2=3Ω Vs=9V work out what the voltage over R1 is 9 X 2/5 = 3.6V 8 of 8
Comments
No comments have yet been made