A circular loop wire with current I1=I∘π and a V shaped wire with current I2 are arranged in a plane as shown in diagram. If magnetic field at O is zero, value of I2 is ? (a)#(13aI_@)/35r# (b)#(12aI_@)/17r# (c)#(aI_@)/r# (d)#(12aI_@)/35r#
1 Answer
Explanation:
The magnetic field due to a straight line segment carrying a current
where
The distance
So, the magnetic field due to one arm of the "V" at the point O is given by
The field due to the "V" is twice of this (each arm contributing the same amount), and this points downwards - as opposed to the upwards field