Physics · Current Electricity

Which one among the following statements related to electric cells and electromotive force (emf) is correct?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1The SI unit of emf is Joule.
2The emf of a battery represents the work done / energy provided per unit charge (or power per unit current).✓
3A secondary cell can be used only once.
4A primary cell is rechargeable.

Correct answer

The emf of a battery represents the work done / energy provided per unit charge (or power per unit current).

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