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 ____________.

विकल्प

• `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"`

Answer 1

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"`