The unit of emf is
Correct answer: D. J/c
- A. Newton
- B. Joule
- C. Ampere
- D. J/c
Explanation
Electromotive force (emf) represents the electrical potential difference or voltage provided by a source such as a battery or generator. It is measured in volts (V).- One volt (V) is equivalent to one joule (J) of energy per coulomb (C) of charge. Therefore, the unit of emf is joules per coulomb (J/C), which is also equivalent to volts (V).
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About Current Electricity
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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