Introduction

Electric current can create a magnetic field - after the discovery of Werstedt in 1819, scientists became curious - can a magnetic field create an electric current? In 1831, scientist Michael Faraday dispelled this curiosity. He discovered that an electric current can be induced by a changing magnetic field. This is called electromagnetic induction. Based on this discovery, electrical devices such as dynamo, transformer etc. were invented.

Unit of electromotive force: Electromotive force or electric force which is abbreviated as E. M. F. is called If a potential difference is created at the two ends of a conductor, electrons or current flows through the said conductor. A potential difference can be created across the two ends of the conductor by a generator or battery or by any means. So the voltage generated in the generator battery is called electromotive force. It is not possible to move one object to another place without external or mechanical force e. M. F. Without it, it is not possible to flow electrons.

So E. M. F can be defined as follows— "The electric force that causes electrons to flow through a conductor is called the electromotive force or E.M.F.

Basically due to potential difference electrons or current flows and e. M. F. A potential difference is created across the two ends of the conductor. So potential difference and electromotive force have the same unit joule/coulomb or volt. Variant difference or e. M. F. Or voltage measuring device is called voltmeter. In any circuit or circuit it has to be connected in parallel. Its resistance is very high.

Below is the difference between Potential Difference and Electromotive Force:

Electromotive Force (EMF)

1. The potential difference created between the two terminals of the battery or the two terminals of the generator is called electromotive force or the voltage generated in the battery or generator is called E. M. F.

2. E. M. F drives electricity in and out of the battery or generator.

3. Electromotive force causes P.D at any two points in the circuit.

4. E.M.F is also greater then of the potential differences.

5. E. M. F. All circuits create potential differences.

Potential Difference (P.D)

1. The amount of charge that can move a unit positive charge from one end of an electric circuit to the other. Work done is called potential difference.

2. Potential difference drives electrons or electricity between any two points in an electric circuit.

3. E.M. F is the cause of electron flow P.D is the result of electron flow.

4. Potential difference across any part of an electric circuit e. M. less than f.

5. A potential difference is created between any two points in the circuit.

See...

1. Potential & Potential Difference

2. Automatic Night Light Circuit Using NAND gate Chip.

3. Remote Control Switch Board Appliance .

4.Battery charger circuit with indicator

5. Semiconductor

Thank You.

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