Q4 of 238 Page 81

State qualitatively the effect of inserting an iron core into a current-carrying solenoid.

The magnetic field become very strong when the iron core is inserted into a current carrying conductor.


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2

What conclusion do you get from the observation that a current-carrying wire deflects a compass needle placed near it?

 3

Name the scientist who discovered the magnetic effect of current.

 5

Name the rule for finding the direction of magnetic field produced by a straight current-carrying conductor.

 6

State the form of magnetic field lines around a straight current--++carrying conductor.