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Question
A solenoid of 1.5 m length and 4 cm diameter possesses 20 turns per m. A current of 6 A is flowing through it. The magnetic induction at axis inside the solenoid is ____________.
Options
`4.8 pi xx 10^-3 "T"`
`2 pi xx 10^-5 "T"`
`4.8 pi xx 10^-7 "T"`
`2 pi xx 10^-9 "T"`
MCQ
Fill in the Blanks
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Solution
A solenoid of 1.5 m length and 4 cm diameter possesses 20 turns per m. A current of 6 A is flowing through it. The magnetic induction at axis inside the solenoid is `4.8 pi xx 10^-7 "T"`.
Explanation:
`"B" = mu_0 "ni"`
`= 4pi xx 10^-7 xx 20 xx 6`
` = 4.8 pi xx 10^-7 "T"`
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Applications of Ampere’s Circuital Law > Magnetic Field of a Toroidal Solenoid
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