2012 · Q2
Which one among the following correctly defines a unit magnetic pole in SI units? It is the pole which when placed in air at a distance of
General KnowledgePhysics
- A1 foot from an equal and a similar pole repels it with a force of 1 pound
- B1 metre from an equal and a similar pole repels it with a force of 1 newton
- C1 cm from an equal and a similar pole repels it with a force of 1 dyne
- D1 metre from an equal and a similar pole repels it with a force of 1 newton/m2
Explanation
The unit magnetic pole is defined in the CGS system as a pole repelling an identical pole 1 cm away with 1 dyne force.