The temperature coefficient of resistance of eureka is

A. p ositive

B. negative

C. almost zero

D. i nfinite

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  1. Electric lines of force leave or enter the charge surface at an angle of
  2. In electro-mechanical conversion devices like generators and motors the reason why a small air gap is…
  3. The hot resistance of an incandescent lamp is about _______ its cold resistance.
  4. One oersted (Oe) is equivalent to _____ Gb/cm.
  5. A negatively charge body has
  6. It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.
  7. What is another name for relative permittivity?
  8. The permittivity of a material is given by one of the following formulas.
  9. The magnetic field of a magnetized iron bar when strongly heated
  10. The resistivity of a conductor ___________ with an increase in temperature.
  11. The temperature coefficient of resistance of insulators is
  12. The emf induced in a coil due to the change of its own flux linked with it is called
  13. The magnetic flux through a coil changes. This results to the induced emf acting in a direction as to
  14. What is used as the dielectric material in high voltage transformers?
  15. Which of the following magnetic materials can be easily magnetized in both direction?
  16. Lenz' law states that the direction of the induced emf and hence current
  17. A negative ion results when an atom gains an additional
  18. What type of bond is formed when there exists some form of collective interactions between the (negatively…
  19. Germanium atom has ______ protons and ______ electrons.
  20. A magnetic field is
  21. The uncharged particles which have no effect on its atomic charge.
  22. A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing…
  23. The force between two magnetic poles is _____ their poles strength.
  24. What is the unit of magnetomotive force?
  25. Hydrogen is an example of a _____ material.
  26. Hipernik is an alloy containing __________ iron and __________ nickel.
  27. Which of the following is a vector quantity?
  28. What is the unit of reluctance?
  29. Defined as a closed path in which magnetic induction or flux flows
  30. Mmf in a magnetic circuit corresponds to _____ in an electric circuit