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If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is

A. 8 10^6 N

B. 9 10 ^9 N

C. 10^6 N

D. 5 10^6 N

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  1. Electric field intensity at a point is numerically equal to ________ at that point.
  2. How many neutrons does a copper atom have?
  3. If the number of valence electrons of an atom is more than 4a the substance is called
  4. The core of a magnetic equipment uses a magnetic material with
  5. A commercial alloy of aluminum nickela and iron with cobalta copper and titanium added to produce about…
  6. Who developed the electromagnetic theory of light in 1862?
  7. Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying…
  8. Residual magnetism refers to the flux densitya which exists in the iron core when the magnetic field…
  9. Gases whose particles are charged are known as
  10. Which element has four valence electrons?
  11. The amount of magnetizing force to counter balance the resid magnetic material is referred to as
  12. One farad equals
  13. The force between two magnetic poles is _____ their poles strength.
  14. The air space between poles of magnets
  15. A one cubic cm of copper has how many free electrons at room temperature?
  16. The direction of force o a current carrying conductor placed in a m found by
  17. Electric field intensity is measured in
  18. What is the unit of magnetomotive force?
  19. A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
  20. The customary energy unit in atomic and nuclear physics is
  21. All magnetic field originates from
  22. The dielectric constant of most materials lies between
  23. The resistivity of a conductor ___________ with an increase in temperature.
  24. The magnetic field of a magnetized iron bar when strongly heated
  25. The emission of electrons from hot bodies is called
  26. Refers to the magnetic lines
  27. The evaporation of electrons from a heated surface is called
  28. What is the SI unit of conductance?
  29. A 6- V battery is connected across a solenoid of 100 turns having a resistance of 2 ?a Calculate the…
  30. What solid has no defined crystal structure except perhaps in the arrangement of the nearest neighboring…