30 ohms

20 ohms

15 ohms

7 ohms

**Who demonstrated the theory of electromagnetic induction in 1831?****Paramagnetic substance has a relative permeability of****A group of magnetically aligned atoms is called****What is the relative permittivity of air?****Defined as the ratio of the volume occupied by the atoms or ions in a unit cell divided by the volume…****If the value of 25 of a conductor is 1/230 per oCa then the value of 0is****It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.****The force between two magnetic poles varies with the distance between them. The variation is ______…****A theorem which states that an electric current flowing in a circuit produces a magnetic field at external…****If the value of 0 a conductor is 1/234 per oCa then the value of 18is****How is mutual inductance between two coils decreased?****How many electrons are needed in the valence orbit to give a material's stability?****A law that states that the current in a thermionic diode varies directly with the three- halves power…****The electrons in the last orbit of an atom are called _______ electrons.****The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…****What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two…****Which of the following electric quantities is vector in character?****The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force…****If the right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in…****Refers to the non- metallic materials that have the ferromagnetic properties of iron.****The permeability of a material having a flux density of 5 Wb/m^2 is 10^-5 H/m. What is the value of…****Permeability means****Who discovereda the relationship between magnetism and electricity that serves as the foundation for…****An alloy of 22 percent iron and 78 per cent nickel.****If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is****The idea of preventing one component from affecting another through their common electric and magnetic…****All matters (gasa liquid and solid) are composed of****Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required…****If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…****What is the practical unit of electrical energy?**