jee-main 2004 Q55

jee-main · India Not Maths
The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is $54 \mu \mathrm {~T}$. What will be its value at the centre of the loop?
(1) $250 \mu \mathrm {~T}$
(2) $150 \mu \mathrm {~T}$
(3) $125 \mu \mathrm {~T}$
(4) $75 \mu \mathrm {~T}$ 
The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is $54 \mu \mathrm {~T}$. What will be its value at the centre of the loop?\\
(1) $250 \mu \mathrm {~T}$\\
(2) $150 \mu \mathrm {~T}$\\
(3) $125 \mu \mathrm {~T}$\\
(4) $75 \mu \mathrm {~T}$
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