Question

What are the differences between EMF and potential difference ? ​

Answer 1

Explanation:

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Answer 2

E.M.F. :-

• E.m.f is the energy supplied to the unit charge by the cell.
• E.m.f is the cause.
• The emf is also present even when no current is drawn through the battery.
• Its unit is volt.
• It remains constant.
• It is always greater than potential difference.
• It transmits current both inside and outside of the cell.
• Its symbol is E.
• Its formula is E = I (Rtr)
• Rtr = total external and internal resistance.  
• It does not depend on circuit resistance.
• It causes in  electric, magnetic and gravitational field.

POTENTIAL DIFFERENCE :-

• Potential difference is the energy dissipated as the unit charge passes through the components.
• Potential difference is the effect.
• Potential difference across the conductor is zero in the absence of current.
• Its unit is volt.
• It does not remain constant.
• It is always less than emf.
• Potential difference transfer current between two points in the cell.
• Its symbol is V.
• Its formula is V = E – Ir
• It directly depends on the resistance between two points of measurement.
• It induces only in electric field.

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