A long horizontal wire 'A' is rigidly fixed and an another wire 'B' which is placed directly below and parallel to wire 'A'. Wire 'B' remains suspended in air due to magnetic attraction. If direction of current is reversed in any one wire then due to gravity instantaneous acceleration of free wire 'B' (where g is acceleration due to gravity)
A. g, in downward direction
B. g, in upward direction
C. 2g, in dowward direction
D. 2g, in upward direction
Answer:C
A long horizontal wire 'A' is rigidly fixed and an another wire 'B' which is placed directly below and parallel to wire 'A'. Wire 'B' remains suspended in air due to magnetic attraction. If direction of current is reversed in any one wire then due to gravity instantaneous acceleration of free wire 'B' (where g is acceleration due to gravity)
A. g, in downward direction B. g, in upward direction C. 2g, in dowward direction D. 2g, in upward direction