Question Bank NAT • 2 Marks Section 3: Electromagnetic Theory Electrostatics and Magnetostatics

QB_PH_063: Electrostatics and Magnetostatics

Question Statement

A circular loop of radius $R = 0.1\text{ m}$ carries current $I = 2\text{ A}$. The magnetic field at the center in $\mu\text{T}$ (use $\mu_0 = 4\pi \times 10^{-7}$, rounded to one decimal place) is:
Correct Answer
12.5, 12.6
Verified Key

Step-by-Step KaTeX Derivation & Detailed Explanation

### Solution: $B = \frac{\mu_0 I}{2R} = \frac{4\pi \times 10^{-7} \times 2}{0.2} = 4\pi \times 10^{-6}\text{ T} \approx 12.57\mu\text{T}$.
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