Categories > Moving Charges and Magnetism > Biot-Savart's Law > A circular coil $A$ has a radius $R$ and the current flowing through it is $I$. Another circular coil $B$ has a radius $2R$ and if $2I$ is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of (i.e.${B_A}$ to ${B_B}$)

Moving Charges and Magnetism

Question: A circular coil $A$ has a radius $R$ and the current flowing through it is $I$. Another circular coil $B$ has a radius $2R$ and if $2I$ is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of (i.e.${B_A}$ to ${B_B}$)


1) $4 : 1$
2) $2 : 1$
3) $3 : 1$
4) $1 : 1$
Solution: Explanation: No Explanation
Biot-Savart's Law Amperes Law

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