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. Ohm's law cannot be applied to which material?
  2. Which of the following materials has the least hysteresis loop area?
  3. Who discovered superconductivity in 1911?
  4. The resistivity of a conductor ___________ with an increase in temperature.
  5. __________ is a substance of whose molecules consist of the same kind of atom.
  6. Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
  7. The uncharged particles which have no effect on its atomic charge.
  8. How many neutrons does a copper atom have?
  9. The lagging effect between flux density of the material and the magne
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    If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 10^-8 ?a then its resistivity is
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  21. Which of the following materials has the highest dielectric strength?
  22. The simplest type of atom to exist is the ______ atom.
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