
What is the unit in which e.m.f is measured ?
Answer
438.9k+ views
Hint: E.M.F stands for electromotive force. Electromotive force is the electrical action produced by a non-electrical source. Electrical devices provide an e.m.f by converting other forms of energy into electrical energy.
Complete answer:
Firstly, we need to understand the concept of potential difference.Potential difference is the difference of electric potentials between any two points in a closed circuit. And It’s measured in work done per unit positive charge and Its SI unit is Volts denoted as .
Now, Electromotive force (EMF) is the maximum potential difference between the two electrodes of the cell when no current is drawn from the cell and the circuit is open. EMF is independent of the resistance of the circuit. EMF is greater than the potential difference between any two points in a circuit.
It’s to remember that EMF is not a particular force as the name suggests but a measurement of potential difference and It's measured in Volts denoted as . which is equivalent to the meter-kilogram-second.
The symbol for EMF is and its general formula is given as,
Where the voltage of the cell is, is current across the circuit and is the internal resistance of the cell.
Note: Electromotive force remains constant but potential difference may varies and EMF can also be positive as well as negative and the dimensional formula of electromotive force may be represented as , is mass is length is time and is current.
Complete answer:
Firstly, we need to understand the concept of potential difference.Potential difference is the difference of electric potentials between any two points in a closed circuit. And It’s measured in work done per unit positive charge and Its SI unit is Volts denoted as
Now, Electromotive force (EMF) is the maximum potential difference between the two electrodes of the cell when no current is drawn from the cell and the circuit is open. EMF is independent of the resistance of the circuit. EMF is greater than the potential difference between any two points in a circuit.
It’s to remember that EMF is not a particular force as the name suggests but a measurement of potential difference and It's measured in Volts denoted as
The symbol for EMF is
Where the
Note: Electromotive force remains constant but potential difference may varies and EMF can also be positive as well as negative and the dimensional formula of electromotive force may be represented as
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
Recently Updated Pages
Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Trending doubts
Which one of the following is a true fish A Jellyfish class 12 biology CBSE

a Tabulate the differences in the characteristics of class 12 chemistry CBSE

Why is the cell called the structural and functional class 12 biology CBSE

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Write the difference between solid liquid and gas class 12 chemistry CBSE

What is the Full Form of PVC, PET, HDPE, LDPE, PP and PS ?
