Concept:Magnetic field strength (or magnetic flux density) has the SI unit Tesla (\( \text{T} \)). It can be expressed in various derived SI units and relates to the CGS unit (Gauss).
Formula:$$ \text{B} = \frac{\Phi}{A} = \frac{F}{IL} $$
Solution:- Evaluate Option C: \( \text{Tesla} = \frac{\text{Weber}}{\text{m}^2} \). This is correct.
- Evaluate Option A: Using \( B = \frac{F}{IL} \), \( 1 \ \text{T} = \frac{\text{N}}{\text{A \cdot m}} = \text{N m}^{-1} \text{A}^{-1} \). Since \( 1 \ \text{T} = 1 \ \text{wb m}^{-2} \), this is also correct.
- Evaluate Option B: The conversion factor between SI (Tesla) and CGS (Gauss) is exactly \( 1 \ \text{T} = 10^4 \ \text{G} \). This is correct.
- Since all individual statements are correct, the answer is "All of these".
Why other options are incorrect:No single option (A, B, or C) is incorrect; therefore, selecting only one of them would be incomplete.
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