Question

38. A current carrying conductor is placed as shown in
figure. The magnitude of magnetic field at point P
will be
Р
Mozi
2i TI
T
(1)
+1
(2)
Mo 2i (a
4R r 12
4R
2
TT
(3)
(4)
ith
Moir
HO
4 nr 2
charge particle moving with velocity v enter in
4 nr
ac​

Answer 1

Answer:

Nobody really knows. It is an observed phenomenon that a magnetic field forms around a current. We don’t even really know what a magnetic field is. We can create it, predict it, control it, and do wonderful things with it, but we have not idea what it actually is.