SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An electromotive force or potential difference expressed in volts.
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An electric current is the rate of flow of electric charge past a volt or region.
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the measure of the opposition to current flow in an electrical circuit these are measured in Ohm’s.
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None of the above
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Detailed explanation-1: -EMF or electromotive force is the potential difference generated by one or more cells or a changing magnetic field in a solar cell, and voltage is the potential difference measured at any two points in the magnetic field. The SI unit and voltage of EMF are the same (volt).
Detailed explanation-2: -Electromotive force (EMF) is equal to the terminal potential difference when no current flows. EMF and terminal potential difference (V) are both measured in volts, however they are not the same thing. EMF () is the amount of energy (E) provided by the battery to each coulomb of charge (Q) passing through.
Detailed explanation-3: -The potential difference is expressed in volt (V). The potential difference between two points is said to be 1 volt if the work is done in moving 1-coulomb charge from one point to other is 1 joule.
Detailed explanation-4: -The electromotive force is the quantity of energy that each coulomb of charge receives, whereas the potential difference is the amount of energy used by 1 coulomb of charge. The symbol E represents electromotive force, whereas the symbol V represents potential difference.