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Chapter 21: Q13CQ (page 771)

Is every emf a potential difference? Is every potential difference an emf? Explain.

Short Answer

Expert verified

Every emf is a potential difference.

Step by step solution

01

Step 1:Definition of emf

Electromotive force is the energy provided by a cell or battery per coulomb of charge passing through it, it is measured in volts. It is the potential difference across the cell when no current is flowing.

02

What is the potential difference?

Emf remains constant and it can be looked at as a 'cause'.

The potential difference is the amount of work to be done to move a unit positive charge from one point to another. It is also measured in volts.

But the main difference is that it does not have to remain constant and that it is considered as a 'result'.

From this, it can be concluded that every emf is the potential difference that is measured in the open circuit.

Yes, every emf is a potential difference.

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