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a) The circuit below shows a cell of emf, E and internal resistance, r connected to an extemal resistance, R. The potential difference across R Is measured on a very high resistance digital voltmeter and found to have a value, V volts. When the values of E. R and V are known, the value of the internal resistance can be calculated from the formula r = (E-V)R V. Using Ohms law for the circuit shown, prove this formula is correct. RI

a) The circuit below shows a cell of emf, E and internal resistance, r connected to an extemal resistance, R. The potential difference across R Is measured on a very high resistance digital voltmeter and found to have a value, V volts. When the values of E. R and V are known, the value of the internal resistance can be calculated from the formula r = (E-V)R V. Using Ohms law for the circuit shown, prove this formula is correct. RI

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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The circuit below shows a cell of emf, E and internal resistance, r connected to an a) extermal resistance, R. The potentlal difference across R Is measured on a very high resistance digital voltmeter and found to have a value, V volts. When the values of E. R and V are known, the value of the internal resistance can be calculated from the formula r (E-V) R Using Ohms law for the circuit shown, prove this formula is correct. R. E.
Transcribed Image Text:The circuit below shows a cell of emf, E and internal resistance, r connected to an a) extermal resistance, R. The potentlal difference across R Is measured on a very high resistance digital voltmeter and found to have a value, V volts. When the values of E. R and V are known, the value of the internal resistance can be calculated from the formula r (E-V) R Using Ohms law for the circuit shown, prove this formula is correct. R. E.
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