It is **the difference of the electrode potentials of the two electrodes when the cell is under operation**. It is the maximum voltage that the cell can deliver. It is always less then the maximum value of voltage which the cell can deliver.

Emf.

Nature of reaction | ||
---|---|---|

Equilibrium | 0 | 0 |

Non – spontaneous | + | – |

**EMF stands for electromotive force**. **MMF stands for magnetomotive force**. It is defined as the driving force responsible for the movement of the electrons in an electrical circuit. It is defined as the driving force responsible for the creation of magnetic flux in a magnetic circuit.

It is **the difference of the electrode potentials of the two electrodes when the cell is under operation**. It is the maximum voltage that the cell can deliver. It is always less then the maximum value of voltage which the cell can deliver.

Emf.

Nature of reaction | ||
---|---|---|

Equilibrium | 0 | 0 |

Non – spontaneous | + | – |

**The electromotive force is the amount of energy given to each coulomb of charge.** **The potential difference is the amount of energy utilized by one coulomb of charge**. The electromotive force is independent of the circuit's internal resistance. The potential difference is proportional to the circuit's resistance.

Magnetic flux is defined as the product of the average mangetic field times the perpendicular area. MMF(Magnetomotiveforce): Magnetomotiveforce is defined as the product of current flowing through the wire and the numbers of windings.

**The m.m.f generates a magnetic flux**. The flux exists within the magnet and the air gap between the poles. The enclosed flux path is called a magnetic circuit. A stronger m.m.f. will produce more flux. The lower the reluctance of the magnetic circuit, the more flux will be produced.

The resultant field MMF F _{R} is obtained **by taking -F _{AR} vectorially to F _{O}** as shown above. From the triangle OCB, AC = F

In other words, a pressure which drives the gametic flux from north pole to the south pole is called MMF (Magnetomotive force). In short, **a force which is responsible to drive flux in the magnetic circuit (same as electromotive (EMF) which drives electron in an electric circuit) is known as magnetomotive force** .

In both AC and DC fields, **the reluctance is the ratio of the magnetomotive force (MMF) in a magnetic circuit to the magnetic flux in this circuit**. In a pulsating DC or AC field, the reluctance also pulsates (see phasors). ("R") is the reluctance in ampere-turns per weber (a unit that is equivalent to turns per henry).

The polarity of the mmf from a coil of wire can be determined from a modification of the right-hand rule: **If the fingers of the right hand curl in the direction of the current flow in a coil of wire, then the thumb will point in the direction of the positive mmf** .

MMF Method is also known as **Ampere Turn Method**. The synchronous impedance method is based on the concept of replacing the effect of armature reaction with an imaginary reactance, the Magnetomotive force (MMF).

Terminal voltage is the potential difference across the terminals when the circuit is switched on. Whereas EMF is the maximum potential difference that a cell or a generator is able to produce when there is no current flow across it.

The synchronous impedance method or EMF method is **used to determine the voltage regulation of the larger alternators**. The synchronous impedance method is based on the concept of replacing the effect of armature reaction by an imaginary reactance.

The magnetomotive force, mmf, is **analogous to the electromotive force and may be considered the factor that sets up the flux**. The mmf is equivalent to a number of turns of wire carrying an electric current and has units of ampere-turns.

**Yes, a data analyst can make 100k**.

A data analyst with advanced skills or at least 3 years of work experience can easily earn an average salary of over $100,000 per year.

**9 Characteristics of an Assertive Communication Style**

- Direct eye contact shows that the speaker is strong and not intimidated.
- An assertive stance or posture with the right balance of strength and casualness.
- Tone of voice.
- Facial expression.
- Timing.
- Nonthreatening, non-blaming language.
- Clarity.
- Positive language.

Symbiosis National Aptitude Test, popularly known as SNAP, is the MBA Entrance Exam for Admission to 16 Symbiosis Institutes in India. Every year around 1 lakh students from all disciplines including Engineering, Commerce, Humanities and even Law take SNAP Test to get into of the **2,500 MBA seats** in Symbiosis colleges.

In 1848 the British physicist **William Thomson** (later Lord Kelvin) proposed a system that used the degree Celsius but was keyed to absolute zero (−273.15 °C); the unit of this scale is now known as the kelvin.

A quantitative form of Joule's law is that **the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I ^{2}R**. The power P has units of watts, or joules per second, when the current is expressed in amperes and the resistance in ohms.

**NMAT 2019 analysis reflects the exam was of moderate to tough difficulty level**. While SNAP 2019 analysis reflects the exam was of moderate difficulty level.

Each 120 degrees rotation of an **equilateral triangle** will return the original equilateral triangle, so an equilateral triangle has an order of rotational symmetry of 3.

Dated : 18-Jul-2022

Category : Education