Two parallel long wires separated by a distance 'd' carry equal current 'i' What is the magnetic induction at a point mid way between the wires if
(a) currents are in the same direction ?
(b) currents are in opposite direciton ?

Explanation

To solve the problem of finding the magnetic induction at a point midway between two parallel long wires carrying equal currents, we will analyze both cases: when the currents are in the same direction and when they are in opposite directions.

### Given:
- Two parallel long wires separated by a distance \( d \).
- Both wires carry equal current \( i \).

### (a) When the currents are in the same direction:

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