A 100-m-long wire carrying a current of 4.0 A will be accompanied by a magnetic field of what strength at a distance of 0.050 m from the wire? (magnetic permeability in empty space µ₀= 4p x 10^-7 T*m/A)

Question

Quizplus · Accepted Answer

The magnetic field strength (B) at a distance (r) from a long straight wire carrying a current (I) can be calculated using the formula:

B = (µ0 × I) / (2π × r)

where µ0 is the magnetic permeability in empty space, which is given as 4π × 10^-7 T·m/A in the question.

Plugging in the given values, we get:

B = (4π × 10^-7 T·m/A × 4.0 A) / (2π × 0.050 m)
B = 1.6 × 10^-5 T

Therefore, the correct choice is C, 1.6 × 10^-5 T.

A 100-M-Long Wire Carrying a Current of 4