The magnetic field due to a current carrying loop of radius 3 cm at a point on its axis at a distance 4 cm from the center is 54 µT. What will be its value at the centre of the loop?
(a) 250 µT
(b) 150 µT
(c) 125 µT
(d) 75 µT
Correct option: (a) 250 µT
Explanation:
Magnetic field at a distance x from the center of the coil of radius R and carrying a current I is
