Hans Christian Oersted

Sir Charles Wheatstone

Georg Ohm

James Clerk Maxwell

**Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability…****Which of the following is a natural magnet?****If the value of 25 a conductor is 1/255 per oCa then the value of 20is****Defined as the ratio of the volume occupied by the atoms or ions in a unit cell divided by the volume…****A t/m is a unit of****Electron is a Greek word for****Hydrogen is an example of a _____ material.****What is the unit of magnetomotive force?****A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional…****The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole…****Electric field intensity is a ________.****The air space between poles of magnets****The force acting on a pole of 5 Wb is 25 N. What is the intensity of the magnetic field?****Magnetic fields do not interact with****The temperature coefficient of resistance of conductors is****Another term for corona discharge.****A law establishing the fact that the algebraic su of the rises and drops of the mmf around a closed…****A germanium atom has an atomic weight of72. How many neutrons are there?****How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?****When the ferromagnetic substance is inserted in a current- carrying solenoida the magnetic field is****If the number of valence electrons of an atom is exactly 4a then the substance is called****The temperature coefficient of resistance of eureka is****What is the maximum number of electrons that can be accommodated in the last orbit of an atom?****The unit of flux density is****Electromotive force in a circuit****An electron- volt (eV) is a unit of****Electric potential is a _______ quantity.****If the distance between two magnetic poles decreases by 2 timesa the force between them****A law that states that the current in a thermionic diode varies directly with the three- halves power…****The core of a transformer heats up when its primary is fed from an ac source because of**