Question

choose a correct one-- we are more likely to observe a strong magnetic effect with a-- a) current carrying straight wire. b) current carrying circular coil of many turns wound on a soft iron core. c) current carrying coil of many circular turns. d) current carrying circular coil of a single turn

Answer 1

current carrying circular coil of many turns wound on a soft iron core

Answer 2

current carrying circular coil of many turns wound on a soft iron core because as we the magnetic strength of electromagnet increases when the number of turns are more in the coil.