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The phenomenon by which a subtracts pieces of iron

A. Magnetism

B. Electromagnetism

C. Naturalism

D. Materialism

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  1. What is the SI unit of conductivity?
  2. Lenz's law is the consequence of the law of conservation of
  3. Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as
  4. The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
  5. The magnetic field of a magnetized iron bar when strongly heated
  6. If the magnetic material is located within a coil through which alternating current (60 Hz frequency)…
  7. The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab…
  8. What is the SI unit of specific resistance or resistivity?
  9. The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole…
  10. The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge…
  11. What is the cgs unit of magnetomotive force?
  12. A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing…
  13. Back emf refers to the
  14. The B-H curve for ________ is a straight line passing through the origin.
  15. The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.
  16. Who discovered the most important electrical effects which is the magnetic effect?
  17. In electro-mechanical conversion devices like generators and motors the reason why a small air gap is…
  18. This paper does not exhibit electricity because it contains the same number of
  19. How is mutual inductance between two coils decreased?
  20. The unit of electrical energy is
  21. Electron is a Greek word for
  22. Refers to the non- metallic materials that have the ferromagnetic properties of iron.
  23. An atom or a group of atoms that carries a net electric charge.
  24. Which of the following is a vector quantity?
  25. The reluctance of a magnetic circuit is not dependent on which of the following?
  26. A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material…
  27. When a current carrying conductor is placed in a magnetic fielda the maximum force will act on the conductor…
  28. The temperature coefficient of resistance of insulators is
  29. Which element has four valence electrons?
  30. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…