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Question: Answered & Verified by Expert

A solenoid of 1000 turns per metre has a core with relative permeability 500. Insulated windings of the solenoid carry an electric current of 5 A. The magnetic flux density produced by the solenoid is:

(Permeability of free space=4π×10-7 H m-1)

PhysicsMagnetic Effects of CurrentJEE MainJEE Main 2021 (17 Mar Shift 1)
Options:
  • A π T
  • B 2×10-3π T
  • C π5 T
  • D 10-4π T
Solution:
1380 Upvotes Verified Answer
The correct answer is: π T

B=μnI=μ0μrnI

B=4π×10-7×500×1000×5

B=π Tesla

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