![electromagnetic - Can I increase range of a near field magnetic inductor from 10cm to 100cm by increasing radius of ferrite rod coil by 30 times? - Electrical Engineering Stack Exchange electromagnetic - Can I increase range of a near field magnetic inductor from 10cm to 100cm by increasing radius of ferrite rod coil by 30 times? - Electrical Engineering Stack Exchange](https://i.imgur.com/vncEeeS.png)
electromagnetic - Can I increase range of a near field magnetic inductor from 10cm to 100cm by increasing radius of ferrite rod coil by 30 times? - Electrical Engineering Stack Exchange
![13. A closely wound flat circular coil of 25 turns of wire has diameter of 10 cm and carries a current of 4 ampere. Determine the magnetic flux density at the centre 13. A closely wound flat circular coil of 25 turns of wire has diameter of 10 cm and carries a current of 4 ampere. Determine the magnetic flux density at the centre](https://instasolv1.s3.ap-south-1.amazonaws.com/QuestionBank/5da30e90738bf611fc653fef/solution_5da30fc5738bf611fc6543d3.png)
13. A closely wound flat circular coil of 25 turns of wire has diameter of 10 cm and carries a current of 4 ampere. Determine the magnetic flux density at the centre
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