A long straight wire carrying current of 30 A is placed in an external uniform magnetic field of 4×10−4T parallel to the current. The magnitude of net magnetic field at point 2 cm away from the wire is

Question:

A long straight wire carrying current of 30 A is placed in an external uniform magnetic field of 4×10⁻⁴T parallel to the current. The magnitude of net magnetic field at point 2 cm away from the wire is

Options :

(a) 10^-4
(b) 3 x 10^-4
(c) 5×10^-4
(d) 6×10^-4

Answer :

Answer Steps :

step 1:

step 2:

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