Lenz's law is the consequence of the law of conservation of

A. Energy

B. Charge

C. Field lines

D. Momentum

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  1. What is the SI unit of conductance?
  2. When the relative permeability of a material is slightly more than 1a it is called ______ material.
  3. The emission of electrons from hot bodies is called
  4. The force which set ups or tends to set up magnetic flux in a magnetic circuit
  5. The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.
  6. Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through…
  7. How is mutual inductance between two coils decreased?
  8. The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
  9. In electro-mechanical conversion devices like generators and motors the reason why a small air gap is…
  10. How many turns are needed to produce a magnetomotive force of 1000 A.t for a coil with 6 amperes?
  11. All matters (gasa liquid and solid) are composed of
  12. The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force…
  13. The process by which an emf and hence current is generated or induced in a conductor when there is a…
  14. What is the practical unit of electrical energy?
  15. Permeability means
  16. __________ is a substance of whose molecules consist of the same kind of atom.
  17. The resistance of a material is ____________ its area of cross-section.
  18. The ratio of the permeability of material to the permiabiity of air or vacuum.
  19. Which of the following magnetic materials can be easily magnetized in both direction?
  20. Electron is a Greek word for
  21. Which of the following materials has the highest dielectric strength?
  22. One of the solid structures in which the position of the atoms or ions are predetermined
  23. All magnetic field originates from
  24. The tiniest element of matter
  25. The energy stored in an electrostatic field or electromagnetic field is called
  26. Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying…
  27. The emf produced in a wire by its motion across a magnetic field does not depend upon the
  28. How many electrons are needed in the valence orbit to give a material's stability?
  29. A principle that states that only two electrons with different spins are allowed to exist in a given…
  30. Mmf in a magnetic circuit corresponds to _____ in an electric circuit