Column I | Column II |
(i) The magnetic fields B at P due to the current in the wires are in the same direction. | |
A. Point P is situated midway between the wires above. | (ii) The magnetic fields B at P due to the current in the wires are in the opposite directions. |
B. Point P is situated at the mid point of the line joining the centres of the circular wires, which have same radii. | (iii) Magnetic field at P is zero. |
Answer:
A
matches with (ii) and (iii). Applying Fleming's left hand rule, the magnetic
field at P due to the current will be equal and in opposite direction,
B match with only (i) in column II. Applying Flemings left-hand rule, the
magnetic field at P due to two currents in opposite directions will be in directions.
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