Q33 / 111 · NTA Abhyas (NEET) 2020 · Physics · Electromagnetic Induction

A current i is uniformly distributed over the cross-section of a long hollow cylindrical wire of inner radius R1 and outer radius R2. Magnetic field B varies with distance r from the axis of the cylinder as

  • A
    Figure
  • Correct answer
    B
    Figure
  • C
    Figure
  • D
    Figure

Solution

r < R1, B=0

r > R2 , b=μ0i2πr

R1 < r < R2, B=μ0ir2-R122πrR22-R12

Hence, the correct answer is option: 'B'.

More Electromagnetic Induction Questions