A solenoid is 1.0 metre long and it has 4250 turns. If a current of 5.0 ampere is flowing through it, what is the magnetic field at its centre `[mu_(0
A solenoid is 1.0 metre long and it has 4250 turns. If a current of 5.0 ampere is flowing through it, what is the magnetic field at its centre `[mu_(0)=4pixx10^(-7)"Weber"//amp-m]`
A. `5.4xx10^-2 Wb//m^2`
B. `2.7xx10^-2 Wb//m^2`
C. `1.35xx10^-2Wb//m^2`
D. `0.675xx10^-2Wb//m^2`
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Correct Answer - B
`B=mu_0nI=4pixx10^-7xx4250xx5`
`=60xx4.25xx10^(-4)=2.7xx10^(-2)T`.
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