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If you hold the conductor with right hand so that the stretched thumb points in the direction of the currenta then encircling fingers will give the direction of magnetic lines of force round the conductor. This is known as

A. Left hand cork screw rule

B. Right hand cork screw rule

C. Left hand rule

D. Right hand rule

You can do it
  1. Ohm's law cannot be applied to which material?
  2. One weber of flux is equal to _______ magnetic lines of force.
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    A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 10^-6
  4. The resistance of a material is ____________ its area of cross-section.
  5. If a 20 V potential is applied across a relay coil with 50 turns having 1 ? of resistancea the total…
  6. What is the typical saturation flux density for most magnetic materials?
  7. Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field…
  8. Define as that pole which when placed in air from a similar and equal pole repels it with a force of…
  9. Flux linkages equals
  10. Electric field intensity at a point is numerically equal to ________ at that point.
  11. One of the solid structures in which the position of the atoms or ions are predetermined
  12. Which of the following magnetic materials can be easily magnetized in both direction?
  13. The magnitude of the induced emf in a coil is directly proportional to the rate of change of flux linkages.…
  14. The hot resistance of an incandescent lamp is about _______ its cold resistance.
  15. Ohm's law can be used only to a _____ circuit or component.
  16. Which of the following materials has permeability slightly less than that of free space?
  17. A group of magnetically aligned atoms is called
  18. The relative permeability of a magnetic material is 10^5. What is its permeability?
  19. One farad equals
  20. What is the SI unit of reluctance?
  21. In electro-mechanical conversion devices like generators and motors the reason why a small air gap is…
  22. The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge…
  23. Gases whose particles are charged are known as
  24. The evaporation of electrons from a heated surface is called
  25. Which of the following statements is TRUE?
  26. A magnetic circuit carries a flux iin the iron part and a fluxgin the air gap. What is the leakage coefficient?
  27. The permittivity of a material is given by one of the following formulas.
  28. The flux density in an air-cored coil is 10^-3 Wb/m^2. With a cast iron core of relative permeability…
  29. Which of the following is a paramagnetic material?
  30. As the magnetic intensity decreasesa the relative permeability of a magnetic material