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A straight long wire carrying a current of 30 A is placed in an external uniform magnetic field of $4 × 10^{-4} T$ parallel to the current. The magnitude of the resultant magnetic field at a point 2 cm away from the wire is |
$5 × 10^{-4} T$ $3 × 10^{-4} T$ $2 × 10^{-4} T$ $10^{-4} T$ |
$5 × 10^{-4} T$ |
The correct answer is Option (1) → $5 × 10^{-4} T$ |
