# What is magnetomotive force?

MMF is magnetic force which creates magnetic field in the magnetic material.
MMF is analogues with the EMF.

Mmf is a force that drives magnetic flux in a magnetic circuit.

## Related questions

Description : Magnetomotive force formula

Description : Magnetomotive Force (MMF)

Description : A cast steel frame is to be used as the core of an inductor. An 800 turn coil is wound on the centre limb of the frame which has two similar outer limbs in parallel with each other. The frame has ... -tooth(an air-gab) of 1mm is cut in the centre limb. The relative permeability of steel is 1000.

Description : What is called the EIectro-Motive Force (EMF) of a voltage source? (1) Terminal voltage when load is applied (2) Internal voltage when no load is applied (3) Product of internal resistance and load current (4) Electric pressure provided to the load

Answer : What is called the EIectro-Motive Force (EMF) of a voltage source? (1) Terminal voltage when load is applied (2) Internal voltage when no load is applied (3) Product of internal resistance and load current (4) Electric pressure provided to the load

Description : State principle of transmissibility of force.

Answer : Principle of Transmissibility of Force: It states that if a force acts at a point on a rigid body, it is assumed to act at any other point on the line of action of force within the same body.

Description : Explain how force is measured using load cell

Answer : Load cell are primarily intended for measurement of weight of bodies such as slowly moving vehicles. Load cell utilize an elastic member as primary transducer and strain gauges as secondary transducer. ... is held vertically by guard plates so as to increase its stiffness in the radial direction.

Description : Draw and explain force or weight measurement using load cell.

Answer : Description: Load cells utilize an elastic member as the primary transducer and strain gauges as secondary transducers. Strain gauges may be attached to any elastic member, on which there exists ... across the four arm Wheatstone bridge circuit, is a measure of the weight being applied.

Description : Define the following terms: i) Magnetic flux density, ii) Reluctance, iii) Magneto-motive force, iv) Permeance.

Answer : (i) Magnetic flux density (B): It is the magnetic flux per unit area measured at right angles to the flux path. (Its unit is weber/m2 or tesla).  (ii) Reluctance: It is the ... flux to set up through it and it is reciprocal of reluctance. Permeance = 1/ Reluctance. Unit: weber/ampere.

Description : Define magnetic lines of force. Also draw and show magnetic lines of force of a bar type magnet.

Answer : Magnetic Lines of force- These are the imaginary lines (having no physical existence) introduced by Faraday for the pictorial representation of the distribution of a magnetic field.  OR  A line of ... that the tangent at any point gives direction of the resultant force at that point.

Description : Define magnetic lines of force. Show the magnetic lines of force for bar type magnet.

Answer : Magnetic linens of force is the imaginary lines for magnetic field of magnet around it. These magnetic lines of forces are introduced by Michael Faraday. The direction of lines of force is from N-pole to S-pole. The figure shows lines of force for bar type magnet.

Description : Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative surface? A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

Answer : Which of the following is the name given to the lines of electric force which move so that its beginning traces a closed curve on a positive surface and its end traces a corresponding closed curve on the negative ... A) Tube of surface B) Tube of lines C) Tube of force D) Tube of electricity

Description : In a d.c. machine the force on a conductor placed on the periphery of the conductor is (a) directly proportional to parallel path (b) inversely proportional to the parallel path (c) inversely proportional to the length of the conductor (d) none of these

Description : Which one is a vector quantity out of the followings?  A. Energy B. Volume C. Area D. Force

Answer : Which one is a vector quantity out of the followings?  Force

Description : Which of the statements about the force between two charge is true?  (1) Unlike charges repel each other (2) Like charges attract each other (3) No force exists between two unlike charges (4) A force of repulsion exists between two like charges

Answer : A force of repulsion exists between two like charges.

Description : When the separation between two charges is made four times, the force between them  (a) increases four times (b) decreases four times (c) increases sixteen times (d) decreases sixteen times

Description : A force of 15 newtons is acting on an object which has a mass of 3 kilograms. If this is the only force acting on the object, what is the acceleration of the object?

Description : If the distance between the centers of mass of two bodies is doubled, the gravitational force between the bodies will become what portion of the original force: w) double x) one half y) remain the same z) one quarter

Description : An 8 kilogram mass resting on a frictionless horizontal surface is attached to a spring with a force constant of 50 Newtons per meter. If the velocity of the mass through the equilibrium position is 5 meters per second, what is the mass's maximum displacement from equilibrium?

Description : An electron is directly west of a proton. The force on the electron is in what direction: north, south, east, or west?

Description : A spring with a force constant of 20 newtons per meter is known to obey Hooke's Law. The spring is attached to a mass of 5 kilograms and placed on a horizontal, frictionless surface. The ... and released. What is the kinetic energy of the mass as it passes through its equilibrium position?

Description : A man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If the frictional force is 80 newtons, what is the magnitude of the northward acceleration of the box?

Description : A baseball bat strikes a ball with a force of 30 newtons. If the ball was in contact with the bat for 1/10 of a second, what impulse did the ball receive?

Description : Many common household fluids, such as margarine, undergo a decrease in viscosity when subjected to a shearing force. What is this property called?

Description : When a slingshot exerts a 10 Newton force on a rock, the rock accelerates at 50 meters per second squared. What force is required to accelerate the rock to 150 meters per second squared?

Description : What law describes the force between two stationary electrically charged objects? w) Ampere's law x) Coulomb's law y) Kirchoff's Rules (pron: kir-koff rules) z) Ohm's law

Description : In Bohr's theory of the atom, what force was responsible for holding the electrons in their orbit?

Answer : ANSWER: COULOMB FORCE or THE FORCE OF ATTRACTION BETWEEN THE PROTON (NUCLEUS) AND THE ELECTRON

Description : A box is initially at rest on a horizontal, frictionless table. If a force of 10 Newtons acts on the box for 3 seconds, what is the momentum of the box at the end of the 3 second interval?

Description : A certain machine exerts a force of 200 newtons on a box whose mass is 30 kilograms. The machine moves the box a distance of 20 meters along a horizontal floor. What amount of work does the machine do on the box?

Description : What force between molecules tends to cause most common gases to behave as non-ideal gases? w) Van der Waals' force x) ionic bonding force y) gravitational force z) covalent bonding force

Description : What causes the gas tail of a comet to always point away from the sun? w) solar wind x) air pressure y) centrifugal force z) gravity

Description : What is the source of energy in a supernova explosion? ( Name or describe the force).

Description : It is the daily routine that some students bring undesirable food items from the school-gate. You are full of sorrow to see this condition of your students. What is its remedy? Options: A) ... the principal D) Announcing on the prayer ground in the morning and ask them to avoid such practices

Answer : D) Announcing on the prayer ground in the morning and ask them to avoid such practices

Description : According to United States Air Force officials, a cannon shooting dead chickens at airplanes has proved helpful to demonstrate what kind of damage can result when jets fly into a flock of ... helpful to demonstrate (E) that shoots dead chickens at airplanes has proved helpful in demonstrating

Description : 1. In which years did the Right to Information Act come into force? 2. The electron emitted in beta radiation originates from where? 3. The name of Geoff Bycott is associated with which game? ... of the day during summer? 20. Which Mughal emperor is credited with the composition of Hindi songs?

Answer : Answer : 1 1. 2005 2. Inner orbits of atoms 3. Cricket 4. 23 hrs 56 minutes 4.09 see 5. Tejapala 6. D. W. Eisenhower 7. Inner part of ear 8. V.V. Giri 9. Argon 10. Amir Khusrau 11. R ... low pressure 15. Tomb of Sikandar Lodi 16. 38 ATP 17. In the Supreme Court 18. Cathode 19. Norway 20. Jahangir

Description : 1. In the context of Indian wild life, what is the flying fox? 2. Who appoints the Chairman of the UPSC ? 3. Why is In a hydel station the motion produced in turbines? 4. Moon shaped sand ... ? 20. Who was elected as the President of All-India Khilafat Conference when it met at Delhi in 1919?

Answer : Answer : 1 1. Bat 2. President 3. Due to the flow of water 4. Barkhans 5. Badan Singh 6. Wasp 7. Anemometer 8. Echinodermata 9. Amazon 10. 1761 11. Preamble 12. KEVLAR 13. Industrialisation 14. Lake Superior 15. Lord Cornwallis 16. Music 17. Vectors 18. England 19. Arabian Sea 20. Mahatma Gandhi

Description : What type of force acts on a car moving around a curve? (1) Centrifugal force (2) Cohesive force (3) Centripetal force (4) Gravitational force