A long solenoid is formed by winding 20 turns `cm^-1`. What current is necessary to produce a magnetic field of 20 mT inside the solenoid?

Question

A long solenoid is formed by winding 20 turns `cm^-1`. What current is necessary to produce a magnetic field of 20 mT inside the solenoid?

A long solenoid is formed by winding 20 turns `cm^-1`. What current is necessary to produce a magnetic field of 20 mT inside the solenoid?
A. 8.0 A
B. 4.0 A
C. 2.0 A
D. 1.0 A

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - A
`B=mu_(0)nI`
`because I=(B)/(mu_0n)=(20xx10^-3xx10^7)/(4pixx20xx10^2)=8A`

4 views Answered 2023-02-05 15:29