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Experiment E.F1 Measuring resistance using ammeter & voltmeter Objective: To measure the resistance of an unknown resistor by using different combination of ammeter and voltmeter arrangements and determine the accuracy of the setup. Apparatus: 1 low resistance resistor (LOW), I high resistance resistor (HIGH) , I rheostat ( ~10?) I variable resistor (~50k?), 1 battery box with 3 cells , base meter ( 0-100µA), I shunt (1A), 2voltmeters (1V and 5V) , 1 multimeter ,1 switch Theory : The resistance of a device is defined as R= V/I = Voltage across the device / f current through the device ...(1) The voltage and current can be measured using either one of the arrangements shown in figure A and figure B. Both arrangements have pros and cons. In Figure A, the voltmeter reading gives the correct voltage across R, but the ammeter gives the sum of currents through R and the voltage. In...

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