engineering physics MCQ #5239

A superconductor has a critical current density of 10^6 A/m². What is the critical magnetic field if the radius of the wire is 1 mm?

engineering physics MCQ #5239

  1. Question 1

    Q1. A superconductor has a critical current density of 10^6 A/m². What is the critical magnetic field if the radius of the wire is 1 mm?

    • A) 0.2 T
    • B) 0.5 T
    • C) 1 T
    • D) 2 T

    Answer: 0.5 T

    Explanation: Using J_c = 2H_c / r, we can find H_c = J_c * r / 2 = 0.5 T.