question_answer 55)

  A magnetic compass shows a deflection, when placed near a current carrying wire. How will the deflection of the compass get affected, if the current in the wire is increased? Support your answer with a reason.

Answer:

                  A magnetic compass shows a deflection when placed near a current carrying wire as shown in the figure This deflection of the compass increases because the magnetic field B due to current carrying straight conductor is directly proportional to the strength of the current I passing through it. It is expressed asIf the current is increased then the magnetic field produced is stronger and vice-versa.