Electromotive force is aa)non contact forceb)potentialc)potential differenced)contact forceCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

EMF

is

equal

to

potential difference

between plates when the battery is not connected to any external circuit.

Potential difference

is due to the charge accumulation on the plates. So

EMF

produces a

potential difference

between the two terminals which drives the current

Answer

EMF is equal to potential difference between plates when the battery is not connected to any external circuit.
Potential difference is due to the charge accumulation on the plates. So, EMF produces a potential difference between the two terminals which drives the current.

Answer

Electromotive Force (EMF) Explanation:
EMF is the potential difference between the terminals of a source of electrical energy. It is not a force in the traditional sense but rather a measure of the energy provided by a source to move charge through a circuit.

Definition:
EMF can be defined as the amount of energy provided by a source to move a unit positive charge through a complete circuit.

Units:
The unit of EMF is volt (V) in the International System of Units (SI).

Characteristics:
- EMF is a scalar quantity.
- It is always greater than the potential difference across the terminals when a current is flowing through a circuit.
- EMF is responsible for the flow of current in a circuit.

Example:
Consider a simple circuit with a battery. The EMF of the battery is the maximum potential difference between its terminals when no current is flowing. When a current flows, the potential difference across the terminals will be slightly less than the EMF due to internal resistance within the battery.

Significance:
EMF is crucial in understanding the behavior of electrical circuits and devices. It provides the driving force for the flow of current in a circuit and determines the amount of work done on the charge carriers.
In conclusion, electromotive force is the potential difference or voltage provided by a source of electrical energy to move charge through a circuit. It is not a force in the traditional sense but a measure of energy that drives the flow of current.

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