CURRENT and is always put in connected in series across the device the current is to be measured.An ohmmeter is an electrical instrument that measures electrical resistance (the opposition offered by a substance to the flow of ELECTRIC current).A potentiometer is a device MAINLY used to measure the emf of a given CELL and to compare emf's of cells.2.Ideally, the voltmeter has infinite resistance.Ideally, the ammeter has zero resistance. It is also used to measure the internal resistance of a given cell.EXPLANATION:From the above, it is clear that a potentiometer is the best device to measure e.m.f. of a cell. Therefore OPTION 4 is correct.

"> CURRENT and is always put in connected in series across the device the current is to be measured.An ohmmeter is an electrical instrument that measures electrical resistance (the opposition offered by a substance to the flow of ELECTRIC current).A potentiometer is a device MAINLY used to measure the emf of a given CELL and to compare emf's of cells.2.Ideally, the voltmeter has infinite resistance.Ideally, the ammeter has zero resistance. It is also used to measure the internal resistance of a given cell.EXPLANATION:From the above, it is clear that a potentiometer is the best device to measure e.m.f. of a cell. Therefore OPTION 4 is correct.

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Which of the following device is used to measure the e.m.f. of a cell?

General Knowledge General Awareness in General Knowledge 9 months ago

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CONCEPT:Some measuring devices are: S.No VoltmeterAmmeterOhmmeterPotentiometer1.It is a device used to measure potential difference and is always put in parallel with the ‘circuit element’ across which potential difference is to be measured.It is the device to measure CURRENT and is always put in connected in series across the device the current is to be measured.An ohmmeter is an electrical instrument that measures electrical resistance (the opposition offered by a substance to the flow of ELECTRIC current).A potentiometer is a device MAINLY used to measure the emf of a given CELL and to compare emf's of cells.2.Ideally, the voltmeter has infinite resistance.Ideally, the ammeter has zero resistance. It is also used to measure the internal resistance of a given cell.EXPLANATION:From the above, it is clear that a potentiometer is the best device to measure e.m.f. of a cell. Therefore OPTION 4 is correct.

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Posted on 17 Nov 2024, this text provides information on General Knowledge related to General Awareness in General Knowledge. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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