The imaginary closed loop drawn around a current-carrying conductor, along which Ampere’s circuital law is applied to find the magnetic field, is called
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → an Amperian loop
NCERT (2026-27):
Ampere’s Circuital Law – “… We shall assume that, in such cases, it is possible to choose the loop (called an amperian loop) such that at each point of the loop, either (i) B is tangential to the loop and is a non-zero constant B, or (ii) B is normal to the loop, or (iii) B vanishes.”