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QJEEM21Ph7abf: JEE Main 2021 Physics - Class 12 JEEM21Ph7abf Solution: A solenoid of 1000 turns per metre has a core with relative…

A solenoid of 1000 turns per metre has a core with relative permeability 500. Insulated windings of the solenoid carry an electric current of 5A. The magnetic flux density produced by the solenoid is : (permeability of free space = 4π × 10−7 H/m)

Multiple Choice Options

  • A πT
  • B 2 × 10−3π T
  • C 10−4π T
  • D π5 T

Step-by-Step Verified Solution

B = μ n i

B = μr μ0 n i

B = 500 × 4π × 10−7 × 103 × 5

B = π × 10−3 × 103

B = π T

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