FIGURE 28-10
-Two coaxial circular coils of radius R = 15 cm are positioned a distance d = 20 cm apart, as shown in Fig. 28-10. Calculate the magnetic field half-way between the coils. Each coil carries a current I = 4 A.

Question

FIGURE 28-10 
-Two coaxial circular coils of radius R = 15 cm are positioned a distance d = 20 cm apart, as shown in Fig. 28-10. Calculate the magnetic field half-way between the coils. Each coil carries a current I = 4 A.

Quizplus · Accepted Answer

The magnetic field at the midpoint between two coaxial coils can be calculated using the Biot-Savart Law. For two identical coils, the fields add up. The formula for the magnetic field at the center of a single coil is B = (μ₀I)/(2R). At the midpoint, the field is half of this value for each coil, and since there are two coils, the total field is B = (μ₀I)/(2R). Substituting the given values, the correct answer is approximately 1.9 × 10⁻³ T.

FIGURE 28-10 -Two Coaxial Circular Coils of Radius R = 15 Cm